Merck
All Photos(1)

30089

Sigma-Aldrich

L-半胱氨酸

BioUltra, ≥98.5% (RT)

Synonym(s):
(R)-2-氨基-3-巯基丙酸
Linear Formula:
HSCH2CH(NH2)CO2H
CAS Number:
Molecular Weight:
121.16
Beilstein:
1721408
EC 号:
MDL编号:
eCl@ss:
32160406
PubChem化学物质编号:
NACRES:
NA.26

产品线

BioUltra

检测方案

≥98.5% (RT)

形式

powder or crystals

旋光性

[α]20/D +8.0±0.5°, c = 5% in 5 M HCl

technique(s)

HPLC: suitable

杂质

insoluble matter, passes filter test
≤0.5% foreign amino acids

灼烧残渣

≤0.05% (as SO4)

缺失

≤0.05% loss on drying, 20 °C (HV)

颜色

white

mp

240 °C (dec.) (lit.)

溶解性

1 M HCl: 1 M at 20 °C, clear, colorless

痕量阴离子

chloride (Cl-): ≤100 mg/kg
sulfate (SO42-): ≤50 mg/kg

痕量阳离子

Al: ≤5 mg/kg
As: ≤0.1 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg
Li: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
NH4+: ≤500 mg/kg
Na: ≤100 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg

λ

1 M in 1 M HCl

紫外吸收

λ: 260 nm Amax: 1.5
λ: 280 nm Amax: 0.2

SMILES string

N[C@@H](CS)C(O)=O

InChI

1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)/t2-/m0/s1

InChI key

XUJNEKJLAYXESH-REOHCLBHSA-N

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L-半胱氨酸

product line

BioUltra

product line

-

product line

-

product line

-

assay

≥98.5% (RT)

assay

≥97%

assay

97%

assay

≥98.0%

form

powder or crystals

form

-

form

solid

form

powder

optical activity

[α]20/D +8.0±0.5°, c = 5% in 5 M HCl

optical activity

[α]26/D +8.0 to +9.5°, c = 2 in 5 M HCl

optical activity

[α]20/D +6.5±1.5°, c = 2 in 5 M HCl

optical activity

[α]/D 8 to 9.5°

technique(s)

HPLC: suitable

technique(s)

-

technique(s)

-

technique(s)

-

impurities

insoluble matter, passes filter test, ≤0.5% foreign amino acids

impurities

-

impurities

-

impurities

≤0.5% ninhidrin positive substances (each), ≤10 ppm heavy metals, ≤300 ppm ammonium

应用

L-半胱氨酸已用于抗体接枝过程中未反应的马来酰亚胺的淬灭。也用于制备亚硝基半胱氨酸贮备液,该贮备液用于诱导 S-亚硝基化,以实现可逆的半胱氨酸修饰。

生化/生理作用

半胱氨酸是一种功能性氨基酸,调节生长、繁殖、维持和免疫的代谢。半胱氨酸提供蛋白质中的二硫键。与硫的转运直接相关。牛磺酸是半胱氨酸的代谢产物,可作为抗氧化剂控制细胞氧化还原状态。半胱氨酸参与作为信号分子的硫化氢的形成。
NMDA 谷氨酸受体激动剂。

储存分类代码

11 - Combustible Solids

WGK

WGK 1

闪点(F)

Not applicable

闪点(C)

Not applicable

个人防护装备

dust mask type N95 (US), Eyeshields, Gloves


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