Sigma-Aldrich
Neurotransmission

 Neuropeptides

Cell Signaling & Neuroscience
 
  Angiotensins
Bombesins
Bradykinins
Cholecystokinins
Endothelins
Galanin
Gastrins
Natriuretic Peptides
Neuropeptide Y and Peptide YY
Neurotensins
Opioid Peptides
Other Neuropeptides
Releasing Factors: CRF
Releasing Factors: GH-RH
Releasing Factors: LH-RH
Releasing Factors: PrRP
Releasing Factors: TRH
Releasing Factors: Others
Somatostatins
Tachykinins
Vasoactive Intestinal Peptides
Neurotransmission Table of Contents

Pathway Slide: Major Noradrenergic, Dopaminergic and Serotonergic Pathways in the CNS
Pathway Slide: Intracellular Signaling Pathways
Pathway Slide: NPY Inhibition
Pathway Slide: Ascending Pain Pathway
Pathway Slide: Modulation of Pain Transmission

Angiotensins  
Product Name Product # 
Angiotensin Converting Enzyme from porcine kidney Lyophilized powder ³10 units/mg protein (Bradford) A2580
Angiotensin Converting Enzyme from rabbit lung Lyophilized powder 2-6 units/mg protein (modified Warburg-Christian) A6778
Angiotensin Converting Enzyme Inhibitor ³95 % (TLC) A0773
Benazepril hydrochloride ³98 % (HPLC) solid B0935
Captopril C4042
CGP-42112A >98 % synthetic solid C160
Enalapril maleate salt E6888
L-162,313 ³98 % L1415
PD 123,319 di(trifluoroacetate) salt powder P186
N-[3-(2-Furyl)acryloyl]-Phe-Gly-Gly F7131
Hippuryl-His-Leu acetate salt H4884
N-Hippuryl-His-Leu tetrahydrate H1635
Angiotensin I human ³95 % (HPLC) A9650
Angiotensin Fragment 1-7 ³97 % (HPLC) powder A9202
Angiotensin II human acetate ~95 % (HPLC) powder A9525
[Asn1, Val5]-Angiotensin II ³97 % (HPLC) A6402
[Sar1, Ile8]-Angiotensin II ³97 % (HPLC) powder A8776
[Sar1, Thr8]-Angiotensin II ³97 % (HPLC) A9900
[Sar1, Val5, Ala8]-Angiotensin II ³97 % (HPLC) powder A2275
[Val5]-Angiotensin II ³95 % (HPLC) powder A2900
Angiotensin II antipeptide ³97 % (HPLC) A4184
[des-Arg1]-Angiotensin III ³95 % (HPLC) Lyophilized powder A1599
[Val4]-Angiotensin III ³97 % (HPLC) A6277
Apelin-13 ³95 % A6469
Bombesins back to top
Product Name Product # 
Bombesin ³97 % (HPLC) B4272
Gastrin Releasing Peptide human ³97 % (HPLC) G8022
Gastrin Releasing Peptide porcine ³97 % (HPLC) G1649
b-(2-Naphthyl)-D-Ala-Cys-Tyr-D-Trp-Orn-Val-Cys-b-(2-Naphthyl)-D-Ala-NH2 [disulfide bridge: 2-7] >97 % (HPLC) solid N3280
Neuromedin B ³90 % (HPLC) N3762
Neuromedin U-25 porcine ³97 % (HPLC) solid N8138
Neuromedin U-25 human ³97 % (HPLC) Lyophilized powder N4284
Neuromedin U rat ³97 % (HPLC) Lyophilized powder N4409
Bradykinins back to top
Product Name Product # 
Bradykinin triacetate salt ³98 % (HPLC) B3259
Bradykinin potentiator B ³97 % (TLC) B0507
Na-Adamantaneacetyl-D-Arg-[Hyp3, Thi5,8, D-Phe7]-Bradykinin ³97 % (HPLC) B6029
[Lys-des-Arg9]-Bradykinin ³95 % (HPLC) B1542
Lys-(des-Arg9, Leu8)-Bradykinin trifluoroacetate salt ³95 % B6929
7-Methoxycoumarin-4-acetyl [Ala7-(2,4-Dinitrophenyl)Lys9]-Bradykinin trifluoroacetate salt >94 % (HPLC) B5181
[N-Methyl-D-Phe7]-Bradykinin trifluoroacetate salt >98 % (HPLC) B4806
Bradykinin Fragment 1-5 ³97 % (HPLC) B1401
Bradykinin Fragment 1-8 ³97 % (HPLC) B4397
Bradykinin Fragment 2-9 ³97 % (HPLC) B1901
Bradyzide di(trifluoroacetate) salt hydrate ³98 % B1680
HOE 140 ³94 % solid H157
[des-Arg10]-HOE 140 synthetic >98 % powder H158
Kininogen, low molecular weight from human plasma >95 % (SDS-PAGE) Lyophilized powder K3628
Cholecystokinins back to top
Product Name Product # 
(Tyr[SO3H]27)Cholecystokinin fragment 26-33 Amide ³97 % (HPLC) powder C2175
Cholecystokinin (CCK) Fragment 26-33 Amide, Non-sulfated ³95 % (HPLC) powder C2901
Cholecystokinin Fragment 30-33 Amide hydrochloride ³95 % (HPLC) T6515
Cholecystokinin Precursor Fragment 107-115 Desulfated human >97 % (HPLC) C9482
CR 2945 I9778
Lorglumide sodium salt solid L109
Pentagastrin ³95 % (HPLC) powder B1636
Proglumide sodium salt solid M006
Endothelins back to top
Product Name Product # 
Big Endothelin 38 human ³95 % (HPLC) E9387
Big Endothelin 39 rat ³97 % (HPLC) E7265
Endothelin 1 human, porcine ³97 % (HPLC) powder E7764
[Ala1,3,11,15]-Endothelin 1 E6877
Endothelin 2 ³97 % (HPLC) powder E9012
Endothelin 3 human, rat ³97 % (HPLC) powder E9137
BQ-123 ³99 % Lyophilized powder B150
BQ-610 ³98 % Lyophilized powder B151
BQ-788 ³97 % solid B157
BQ-3020 ³90 % powder E139
IRL-1620 powder E137
Kendomycin from Streptomyces violaceoruber solid K1513
PD 142,893 ³97 % (HPLC) P2959
PD 145,065 ³97 % (HPLC) P3084
Sarafotoxin S6c ³97 % (HPLC) S6545
Sulfisoxazole ³99.0 % S6377
Galanin back to top
Product Name Product # 
Galanin human ³97 % (HPLC) powder G0278
Galanin porcine ³97 % (HPLC) powder G5773
Galanin rat ³97 % (HPLC) powder G8272
Galanin Fragment 1-16, porcine, rat synthetic >98 % powder G112
[2-Aminobenzoyl-Gly1]-Galanin fragment (1-10)-Lys(retro-m-Nitro-Tyr) amide, human trifluoroacetate salt >95 % (HPLC) solid G8916
[D-Trp2]-Galanin fragment 1-29 human >95 % (HPLC) solid G9166
Galanin Fragment (1-13)-Bradykinin Fragment (2-9) Amide trifluoroacetate salt >95 % (HPLC) solid G9041
Galanin-Like Peptide Fragment 1-60 porcine trifluoroacetate salt >97 % (HPLC) solid G8041
Galanin (2-11) porcine, rat ³97 % (HPLC) synthetic G8293
Gastrins back to top
Product Name Product # 
Big Gastrin I human ³97 % (HPLC) G5024
Gastrin I human ³97 % (HPLC) G9020
Gastrin I rat ³97 % (HPLC) G1276
[Leu15]-Gastrin I human ³97 % (HPLC) G9145
Mini Gastrin I human ³97 % (HPLC) G0267
Natriuretic Peptides back to top
Product Name Product # 
Anantin from Streptomyces coerulescens ³90 % (HPLC) A4316
Atrial Natriuretic Peptide human ³97 % (HPLC) A1663
Atrial Natriuretic Peptide rat ³97 % (HPLC) A8208
Brain Natriuretic Peptide-32 human ³97 % (HPLC) powder B5900
Brain Natriuretic Peptide-32 rat ³97 % (HPLC) powder B9901
Dendroaspis Natriuretic Peptide trifluoroacetate salt ³90 % (HPLC) D6189
des(Arg30, Pro31)-Dendroaspis Natriuretic Peptide >95 % (HPLC) solid N8279
Natriuretic Peptide, C-Type ³95 % (HPLC) N8768
Prepro-Atrial Natriuretic Peptide fragment 104-123 human ³95 % (HPLC) P7369
Prepro-Atrial Natriuretic Peptide fragment 26-55 human P7619
Prepro-Atrial Natriuretic Peptide fragment 56-92 human P7494
Urodilatin human ³97 % (HPLC) U5754
Neuropeptide Y and Peptide YY back to top
Product Name Product # 
BIBP 3226 B174
CGP 71683A >98 % (HPLC) solid C4363
Galanin (1-13)-Neuropeptide Y (25-36) Amide ³90 % G8165
Neuropeptide Y human ³95 % (HPLC) powder synthetic N5017
Neuropeptide Y porcine ³97 % (HPLC) synthetic N3266
Neuropeptide Y sheep ³97 % (HPLC) synthetic N6269
Neuropeptide Y Antagonist ³95 % (HPLC) Lyophilized powder N8648
[Ala31, a-Aminoisobutyryl32]-Neuropeptide Y porcine >98 % (HPLC) solid N8154
[Leu31, Pro34]-Neuropeptide Y human ³97 % (HPLC) N6146
[Leu31, Pro34]-Neuropeptide Y porcine ³97 % (HPLC) N7768
Neuropeptide Y Fragment 3-36 human, rat ³97 % (HPLC) N9407
Neuropeptide Y Fragment 13-36 porcine ³97 % (HPLC) N6521
Neuropeptide Y Fragment 19-23-[Gly1, Ser3, Gln4, Thr6, Ala31, a-Aminoisobutyryl-a-methyl-Ala32, Gln34]-Pancreatic Polypeptide human >97 % (HPLC) solid N8404
Neuropeptide Y Fragment 22-36 ³97 % (HPLC) N9409
N-Acetyl-[Leu28, Leu31]-Neuropeptide Y Fragment 24-36 ³98 % (HPLC) powder N9398
Pancreatic Polypeptide Fragment 1-17–[Ala31, a-Aminoisobutyryl32]-Neuropeptide Y Fragment 18-36 >97 % (HPLC) solid P4488
[CPP1-7, NPY19-23, Ala31, Aib32, Gln34]-Pancreatic polypeptide P4118
Pancreatic Polypeptide bovine ³95 % (HPLC) powder P9778
Pancreatic Polypeptide Rana tempraria >97 % (HPLC) solid P4363
Peptide YY human ³97 % (HPLC) synthetic P1306
Peptide YY porcine ³97 % (HPLC) synthetic P5801
Peptide YY Fragment 3-36 human ³95 % (HPLC) Lyophilized powder P220
Peptide YY Fragment 13-36 human trifluoroacetate salt ³97 % (HPLC) P3365
Peptide YY Fragment 13-36 porcine, rat >96 % (HPLC) solid P6613
[Leu31, Pro34]-Peptide YY ³95 % P4107
[Pro34]-Peptide YY ³95 % P3982
Neurotensins back to top
Product Name Product # 
Neurotensin ~95 % (HPLC) N6383
Opioid Peptides back to top
Product Name Product # 
Dynorphin A porcine ³95 % (HPLC) D8147
Dynorphin A Porcine Fragment 1-8 ³97 % (HPLC) D4899
Dynorphin A Porcine Fragment 1-9 ³97 % (HPLC) D4036
Dynorphin A Porcine Fragment 1-13 ³97 % (HPLC) D7017
Dynorphin B porcine ³95 % (HPLC) D1398
a-Endorphin human ³97 % (HPLC) E6136
b-Endorphin bovine, camel, ovine ³97 % (HPLC) E0637
b-Endorphin human ³95 % (HPLC) E6261
b-Endorphin rat ³97 % (HPLC) E1142
Leucine Enkephalin ³95 % (HPLC) L9133
[D-Ser2]-Leucine Enkephalin-Thr acetate salt >97 % solid D191
[D-Ala2, D-Leu5]-Enkephalin acetate salt ³97 % (HPLC) E7131
[D-Ala2, N-Me-Phe4, Gly5-ol]-Enkephalin acetate salt ³97 % (HPLC) E7384
[D-Pen2,5]-Enkephalin ~95 % (HPLC) E3888
[D-Pen2,5, p-Cl-Phe4]-Enkephalin ³97 % (HPLC) E6264
[D-Pen2, Pen5]-Enkephalin ³97 % (HPLC) E2260
[Met5]Enkephalin acetate salt hydrate ³97 % (HPLC) M6638
Methionine Enkephalin-Arg-Phe ³97 % (HPLC) E5757
Acetyl-Arg-Tyr-Tyr-Arg-Ile-Lys Amide >97 % (HPLC) solid A9471
b-Casomorphin bovine ³97 % (HPLC) C5900
b-Casomorphin human ³97 % (HPLC) C0783
CTAP ³95 % C6352
CTOP ³97 % (HPLC) P5296
DALDA >96 % solid D144
[D-Ala2]-Deltorphin II ³97 % (HPLC) T0675
Endomorphin 1 E3273
Endomorphin 2 E3148
ICI 174,864 solid I128
Neuropeptide AF human >95 % (HPLC) solid N5906
[D-Tyr,N-Methyl-Phe3]-Neuropeptide FF >99 % (HPLC) solid N3659
Neuropeptide SF human ³95 % (HPLC) solid N9905
[N-Phe1]-Nociceptin Fragment 1-13 amide synthetic Lyophilized powder N0524
[Phe1-y(CH2-NH)-Gly2]-Nociceptin Fragment 1-13 amide Lyophilized powder N213
[Phe1-y(CH2-NH)-Gly2]-Nociceptin Fragment 1-13 amide >95 % N9908
Nociceptin Receptor Antagonist Peptide III-BTD Lyophilized powder N9273
Nocistatin >98 % Lyophilized powder N215
Orphanin FQ ³95 % (HPLC) O4011
Other Neuropeptides back to top
Product Name Product # 
Acetyl-Diabetes Associated Peptide Fragment 8-37 amide triethylammonium salt sequence human ³95 % (HPLC) A5972
Diabetes Associated Peptide Fragment 20-29 human ³98 % (HPLC) solid A6097
Gly-Gln hydrate ³97 % (TLC) G5149
Hemokinin 1 trifluoroacetate salt 97 % (HPLC) powder H1162
Myomodulin A trifluoroacetate salt ³98 % (HPLC) M3066
Proadrenomedullin Fragment 1-20 human >93 % (HPLC) solid P4613
Secretoneurin mouse, rat trifluoroacetate salt S7065
TIP39 T8407
Urotensin I teleost fish ³95 % (HPLC) U7253
Urotensin II human ³97 % (HPLC) synthetic U7257
Urotensin II mouse ³97 % (HPLC) synthetic U7382
Urotensin II rat ³97 % (HPLC) synthetic U7507
[pGlu110]-Prepro-Urotensin II Fragment 110-123 rat >98 % (HPLC) solid U8132
Releasing Factors: CRF back to top
Product Name Product # 
Antalarmin hydrochloride >98 % (HPLC) solid A8727
Antisauvagine-30 trifluoroacetate salt A4727
Astressin ³90 % (HPLC) A4933
Astressin2B trifluoroacetate salt ³98 % A5227
Corticotropin Releasing Factor bovine ³90 % (HPLC) C2671
Corticotropin Releasing Factor human, rat ³95 % (HPLC) C3042
Corticotropin Releasing Factor sheep ³95 % (HPLC) C3167
Corticotropin Releasing Factor Antagonist ³97 % (HPLC) C2917
Corticotropin Releasing Factor Fragment 6-33 ³97 % (HPLC) C0961
NBI 27914 >98 % (HPLC) N3911
Urocortin human ³85 % (HPLC) powder U4127
Urocortin rat ³97 % (HPLC) powder U6631
Urocortin II mouse U9507
Urocortin III human ³97 % (HPLC) U1008
Urocortin III mouse ³97 % (HPLC) U0883
Releasing Factors: GH-RH back to top
Product Name Product # 
Ghrelin human Lyophilized powder G3902
Ghrelin rat Lyophilized powder G8903
Growth Hormone Releasing Factor bovine ³97 % (HPLC) powder synthetic G0644
Growth Hormone Releasing Factor human ³95 % (HPLC) powder synthetic G8895
Growth Hormone Releasing Factor porcine ³97 % (HPLC) powder synthetic G0769
Growth Hormone Releasing Factor rat ³95 % (HPLC) powder synthetic G6646
Growth Hormone Releasing Factor Fragment 1-29 amide human ³97 % (HPLC) G6771
[D-Lys3]-GHRP-6 synthetic Lyophilized powder G4535
Releasing Factors: LH-RH back to top
Product Name Product # 
Antide ³97 % (HPLC) A8802
Buserelin ³90 % (HPLC) B3303
Leuprolide acetate salt ³98 % (HPLC) L0399
Luteinizing Hormone-Releasing Hormone human acetate salt ³98 % (HPLC) powder L7134
Luteinizing Hormone-Releasing Hormone salmon ³97 % (HPLC) L4897
LH-RH Antagonist >97 % (HPLC) L5788
[D-Ala6]-LH-RH ³97 % (HPLC) L1898
[Biotinyl-Gln1]-LH-RH >97 % (HPLC) L4288
[His(3-Methyl)2]-LH-RH >96 % (HPLC) L4913
[D-Lys6]-LH-RH ³95 % (HPLC) powder L5022
[D-Ser4]-LH-RH >97 % (HPLC) L4663
[D-Trp6]-LH-RH ³97 % (HPLC) powder L9761
[D-Trp6]-LH-RH-Leu-Arg-Pro-Gly-NH2 >96 % (HPLC) L4788
[des-Gly10, D-Ala6]-LH-RH ethylamide ³98 % (HPLC) powder L4513
[des-Gly10, D-His2, D-Trp6, Pro9]-LH-RH ethylamide trifluoroacetate salt >98 % (HPLC) L4163
[des-Gly10, D-His(Bzl)6]-LH-RH ethylamide ³97 % (HPLC) powder L2761
[des-Gly10, D-Ser4, D-His(Bzl)6, Pro9]-LH-RH ethylamide acetate salt >96 % (HPLC) L3663
[des-Gly10, D-Ser4, D-Trp6, Pro9]-LH-RH ethylamide trifluoroacetate salt >98 % (HPLC) L4038
[des-Gly10, D-Trp6]-LH-RH ethylamide ³97 % (HPLC) L5386
[des-Gly10, D-Trp6, D-Leu7, Pro9]-LH-RH ethylamide trifluoroacetate salt >99 % (HPLC) L3913
[des-Gly10, D-Tyr5, D-Trp6, Pro9]-LH-RH ethylamide trifluoroacetate salt >99 % (HPLC) L3788
LH-RH Fragment 1-2 >97 % (HPLC) L5913
LH-RH Fragment 1-4 >98 % (HPLC) L6038
LH-RH Fragment 1-6 amide >97 % (HPLC) White powder L6163
[D-Trp6]-LHRH Fragment, 1-6 >96 % (HPLC) L5038
[D-His(Bzl)6]-LH-RH Fragment 1-7 >96 % (HPLC) L4538
[D-His(Bzl)6]-LH-RH Fragment 2-9 >99 % (HPLC) L4413
Formyl-[D-Trp6]-LH-RH Fragment 2-10 >97 % (HPLC) L5413
[D-His(benzyl)6]-LH-RH Fragment 3-9 ethylamide trifluoroacetate salt >99 % (HPLC) L3538
[D-His(Bzl)6]-LH-RH Fragment 4-9 ethylamide trifluoroacetate salt >95 % (HPLC) L3413
[D-His(Bzl)6]-LH-RH Fragment 5-9 Ethylamide trifluoroacetate salt >98 % (HPLC) L3288
Motilin porcine ³97 % (HPLC) M4505
SDZ-216,887 S3311
Releasing Factors: PrRP back to top
Product Name Product # 
Prolactin-releasing Peptide human ³97 % (HPLC) P6982
Prolactin-releasing Peptide rat ³97 % (HPLC) P7232
Prolactin-releasing Peptide Fragment 12-31 human ³97 % (HPLC) P7107
Prolactin-releasing Peptide Fragment 12-31 rat ³97 % (HPLC) P7357
Releasing Factors: TRH back to top
Product Name Product # 
Thyrotropin releasing hormone acetate ³97 % (HPLC) P2161
Thyrotropin releasing hormone acetate cell culture tested powder T9146
Cyclo(His-Pro) ³98 % (TLC) C3772
pGlu-Glu-Pro Amide ³97 % (HPLC) P2053
pGlu-3-Methyl-His-Pro Amide ³97 % (HPLC) P5173
Thyrotropin releasing hormone ³98 % (HPLC) powder P1319
Releasing Factors: Others back to top
Product Name Product # 
Sauvagine ³97 % (HPLC) S3884
Somatostatins back to top
Product Name Product # 
BIM-23027 trifluoroacetate salt min. 95 % (HPLC) B0434
Cyclo(7-aminoheptanoyl-Phe-D-Trp-Lys-Thr[Bzl]) ³97 % (HPLC) C4801
b-(2-Naphthyl)-D-Ala-Cys-Tyr-D-Trp-Lys-Val-Cys-Thr amide [Disulfide Bridge: 2-7] ³97 % (HPLC) N9642
Seglitide >98 % (HPLC) S1316
Somatostatin ³97 % (HPLC) powder S9129
Somatostatin ³97 % (HPLC) powder cell culture tested S1763
Somatostatin powder cell culture tested S0885
[D-Trp8]-Somatostatin ³97 % (HPLC) S2511
Somatostatin 28 ³97 % (HPLC) S6135
Somatostatin Fragment 2-9 ³97 % (HPLC) solid S9313
Somatostatin Fragment 3-10 ³96 % (HPLC) solid S9438
Somatostatin Fragment 3-14 ³95 % (HPLC) solid S9688
Somatostatin Fragment 7-14 ³96 % (HPLC) solid S9563
Tachykinins back to top
Product Name Product # 
N-Acetyl-L-tryptophan 3,5-bis(trifluoromethyl)benzyl ester ³99 % (TLC) powder A5330
Eledoisin ³97 % (HPLC) E7880
Entero-hylambatin >97 % (HPLC) powder H4534
GR-159897 solid >97 % (HPLC) G7543
GR-64349 >96 % G113
GR-73632 >97 % G114
GR-82334 >97 % G115
GR-94800 >96 % powder G130
Hylambatin >96 % (HPLC) H0409
L-659,877 >95 % powder L117
L-703,606 oxalate salt solid L119
L-733,060 hydrochloride solid L137
L-733,061 hydrochloride solid L138
MEN-10,376 ³95 % (HPLC) solid M157
Neurokinin A ³97 % (HPLC) N4267
Neurokinin B ³95 % (HPLC) N4143
[b-Ala8]-Neurokinin A Fragment 4-10 ³97 % (HPLC) powder N147
[Ala5, b-Ala8]-a-Neurokinin Fragment 4-10 ³97 % (HPLC) N6144
SB 218795 >98 % (HPLC) S8817
SB 222200 >98 % (HPLC) S5192
Substance P acetate salt hydrate ³95 % (HPLC) powder S6883
[D-Arg1, D-Phe5, D-Trp7,9, Leu11]-Substance P ³97 % (HPLC) S3144
[D-Arg1, D-Trp7,9, Leu11]-Substance P acetate salt ³97 % (HPLC) S0274
[Sar9]-Substance P ³97 % (HPLC) S6636
[Sar9, Met(O2)11]-Substance P ³97 % (HPLC) S3672
d-Aminovaleryl-[Pro9, Leu(N-Me)10]-Substance P Fragment 7-11 >99 % (HPLC) solid S2314
Acetyl-[Arg6, Sar9, Met(O2)11]-Substance P Fragment 6-11 ~98 % S2275
Succinyl-[Asp6, N-Me-Phe8]-Substance P Fragment 6-11 ³97 % (HPLC) S6772
WIN 51,708 solid W103
WIN 62,577 solid W104
Vasoactive Intestinal Peptides back to top
Product Name Product # 
Helodermin >90 % (HPLC) Ethanol solution H4660
Vasoactive Intestinal Peptide from human, porcine, rat ³95 % (HPLC) powder V6130
Vasoactive Intestinal Peptide from human, porcine, rat ³95 % (HPLC) powder V3628
Vasoactive Intestinal Peptide Fragment 6-28 human, porcine, rat ³97 % (HPLC) V4508
Vasoactive Intestinal Peptide Fragment 10-28 human, porcine, rat acetate salt ³97 % (HPLC) V5380
[D-p-Cl-Phe6, Leu17]-Vasoactive Intestinal Peptide human, porcine, rat ³97 % (HPLC) V4380
[Lys1, Pro2,5, Arg3,4, Tyr6]-Vasoactive Intestinal Peptide human, porcine, rat ³97 % (HPLC) V2132

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