Custom DNA Oligos Modifications

Sigma offers over 200 modifications for both DNA and RNA oligonucleotides and probes. Sigma can attach fluorescent dyes to oligos at the 5'-end, 3'-end and internal positions. Our product offering includes common dye modifiers such as 6-FAM™, HEX™, and TET™, as well as exotic modifications.

In addition to standard fluorescent modifications, we have the capabilities to provide dual-labeled probes including Molecular Beacons, LightCycler® Probes, and Scorpions® Probes.

Modification Categories

          

 

Fluorescent Positions Excitation
Maximum (nm)
Emission
Maximum (nm)
Fluorescent Color
5-FAM™ (fluorescein) 5' End 494 520 Green
6-FAM™ (fluorescein) 5' End, 3' End 494 515 Green
6-ROX™ 5' End, 3' End 575 602 Orange
Cyanine 3 5' End, 3' End 550 570 Green-Yellow
Cyanine 5 5' End, 3' End 651 674 Red
Cyanine 5.5 5' End 675 694 Red
Fluorescein dT (FAM dT) 5' End, Internal 494 522 Green
HEX™ 5' End 535 555 Green
JOE™ 5' End, 3' End 520 548 Green
6-Carboxy-rhodamine 6G™ 5' End, 3' End 524 550 Green
5-ROX™ 5' End, 3' End 573 602 Orange
6-TAMRA™ 3' End 540 564 Green-Yellow
6-TAMRA™ NHS Ester 5' End 555 576 Yellow
TET™ 5' End 521 536 Green
Bodipy® 558/568 5' End, 3' End 559 568 Green-Yellow
Bodipy® 564/570 5' End, 3' End 563 569 Yellow
Bodipy® 576/589 5' End, 3' End 575 588 Yellow-Orange
Bodipy® 581/591 5' End, 3' End 581 591 Yellow-Orange
Bodipy® 630/650-X 5' End, 3' End 625 640 Red
Bodipy® 650/665-X 5' End, 3' End 646 660 Red
Bodipy® TR-X 5' End, 3' End 588 616 Orange-Red
Oregon Green® 488 5' End, 3' End 495 521 Green
Oregon Green® 488-X 5' End, 3' End 494 517 Green
Oregon Green® 514 5' End, 3' End 506 526 Green
Pacific Blue™ 5' End, 3' End 416 451 Violet-Blue
Rhodamine Red™-X 5' End, 3' End 560 580 Yellow-Orange
Texas Red®- X 5' End, 3' End 583 603 Red-Orange
Alexa Fluor® 488 5' End, 3' End 495 519 Green
Alexa Fluor® 546 5' End, 3' End 554 570 Green-Yellow
Alexa Fluor® 647 5' End, 3' End 651 672 Red
Alex Fluor® 680 5' End, 3' End 684 707 Red
WellRED D2-PA 5' End 750 770 Red-Infrared
WellRED D3-PA 5' End 685 706 Red
WellRED D4-PA 5' End 650 670 Red
Attachment Positions Purifications    
Amine        
DMS(O)MT-Amino-Modifier-C6 5' End Cartridge, HPLC  
Amino-Modifier-C3-TFA 5' End Desalt, HPLC  
Amino-Modifier-C12 5' End Cartridge, HPLC  
Amino-Modifier-C6-TFA 5' End Desalt, PAGE  
Amino-dT 5' End Cartridge, HPLC  
Amino-Modifier-5 5' End Cartridge, HPLC  
Amino-Modifier-C2-dT Internal Desalt, Cartridge, HPLC, PAGE  
Amino-Modifier-C6-dT Internal Desalt, Cartridge, HPLC, PAGE  
3'-Amino-Modifier-C7 3' End Desalt, Cartridge, HPLC, PAGE  
Glycerol        
Glyceryl 3' End Desalt, Cartridge, HPLC, PAGE  
Phosphate        
Phosphate 3', 5' End Desalt, PAGE (5')
Desalt, Cartridge, HPLC, PAGE (3')
Phosphate II
5' End Cartridge, HPLC  
Thiol        
5'-Thiol-Modifier C6 S-S 5' End, Internal Cartridge, HPLC  
3'-Thiol-Modifier-C3 S-S 3' End Desalt, Cartridge, HPLC, PAGE  
Binding Positions Purifications    
Biotin        
5'-Biotin 5' End Desalt, Cartridge, HPLC, PAGE  
Biotin Internal HPLC, PAGE  
Biotin-dT 5' End, Internal HPLC, PAGE  
Biotin-TEG 5' End, Internal Cartridge, HPLC  
3'-Biotin-TEG 3' End HPLC, PAGE  
Digoxigenin        
Digoxigenin 5' End, 3' End
HPLC    
Dinitrophenol        
2,4-Dinitrophenyl-TEG 5' End, Internal HPLC    
Spacer Positions Purifications    
Spacer        
Spacer 9 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
Spacer 12 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
Spacer 18 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
Spacer C3 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
3'-Spacer-C3 3' End Desalt, Cartridge, HPLC, PAGE  
Analog Positions Purifications    
Chain Terminating        
3'-dA 3' End Desalt, Cartridge, HPLC, PAGE  
3'-dG 3' End Desalt, Cartridge, HPLC, PAGE  
3'-dC 3' End Desalt, Cartridge, HPLC, PAGE  
3'-dT 3' End Desalt, Cartridge, HPLC, PAGE  
Chemotherapeutic        
Cytosine Arabinoside (araC) Internal Desalt, Cartridge, HPLC, PAGE  
2',3'-dideoxycytidine (ddC) 3' End Desalt, Cartridge, HPLC, PAGE  
Contamination Prevention      
Ribo U 3' End Desalt, Cartridge, HPLC, PAGE  
Crosslinking        
8-Br-dA 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
8-Br-dG 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
5-Br-dC 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
5-Br-dU 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
5-F-dU 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
5-I-dC 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
5-I-dU 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
2-Thio-dT 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
4-Thio-dT 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
6-Thio-dG 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
Damage and Repair        
2'-Deoxypseudouridine 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
5,6-Dihydro-dT 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
5,6-Dihydro-dU 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
5-OH-dC 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
5-OH-dU 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
8-Oxo-dA 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
8-Oxo-dG 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
Thymidine Glycol 5' End, Internal PAGE    
TMP-F-dU, F-dC Internal Desalt, Cartridge, HPLC, PAGE  
dUracil 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
Degenerate        
2'-Deoxynebularine 5' End, Internal Cartridge, HPLC, PAGE  
Derivative K (dK) 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
Derivative P (dP) 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
Inosine 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
5-Nitroindole 5' End, Internal,
5' End
Desalt, Cartridge, HPLC, PAGE  
3-Nitropyrrole 5' End, Internal,
3' End
Desalt (Internal only), Cartridge, HPLC, PAGE
Duplex Stabilizing        
2,6-Diaminopurine 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
5-Me-dC 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
Fluorescent        
2-Aminopurine 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
Etheno-dA 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
Methylation Mutagenesis      
N6-Me-dA 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
O6-Me-dG 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
O4-Me-dT 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
No Base        
dSpacer Internal Desalt, Cartridge, HPLC, PAGE  
siRNA Guide Strand Selection      
5'-OMe-dT 5' End Desalt, HPLC, PAGE  
Structure and Function      
7-Deaza-dA 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
7-Deaza-dG 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
7-Deaza-dX 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
7-Deaza-8-Aza-dA 5' End, Internal Desalt, Cartridge, HPLC, PAGE  
dA-5' (Inverse Oligo) 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
dG-5' (Inverse Oligo) 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
dC-5' (Inverse Oligo) 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
dT-5' (Inverse Oligo) 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
Translation Termination      
Puromycin 3' End Desalt, Cartridge, HPLC, PAGE  
Intercalation Positions Purifications    
Acridine        
Acridine Internal Desalt, Cartridge, HPLC, PAGE  
Psoralen        
C2 5' End Desalt, Cartridge, HPLC, PAGE  
C6 5' End Desalt, Cartridge, HPLC, PAGE  
Antisense Positions Purifications    
Cholesterol        
Cholesteryl-TEG 5' End, Internal Cartridge, HPLC  
3'-Cholesteryl-TEG 3' End Desalt, Cartridge, HPLC, PAGE  
Methyl RNA        
2'-OMe-RNA A 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
2'-OMe-RNA G 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
2'-OMe-RNA C 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
2'-OMe-RNA U 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
Thiophosphate        
Thiophosphate (S-Oligo) 5' End, Internal,
3' End
Desalt, Cartridge (5' End, Internal)
Desalt, Cartridge, HPLC, PAGE (3' End)
2' 5' Synthesis        
dA-5' 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
dG-5' 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
dC-5' 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  
dT-5' 5' End, Internal,
3' End
Desalt, Cartridge, HPLC, PAGE  

Phosphorothioates

Phosphorothioates (or S-oligos) are a variant of normal DNA in which one of the non-bridging oxygens is replaced by sulfur. The sulfurization of the internucleotide bond creates a molecule that is resistant to cellular nuclease degradation. Sulfur bonds can be introduced at the 5’, 3’, or internal positions.

Minimum Yield Guarantees

Modified Oligos (O.D./µg)*
Scale (µmole) Desalt Cartridge HPLC PAGE
0.05 2/60 0.4/12 0.4/12 0.2/6
0.2 5/150 1/30 1/30 0.4/12
1.0 16/480 5/150 5/150 2/60
10 160/4,800 NA 52/1,560 NA
15 240/7,200 NA 76/2,280 NA

*Guarantees are for 20 mers or longer.  Oligos shorter than 20 bases will have proportionally fewer ODs. Microgram amounts are calculated based on a 30 μg/OD value.  If the μg/OD value is less than 30, the reported μg value will be proportionally less. Phosphorothioated yields are 70% of the above stated values. Post-synthesis modifications may yield 50% less than the above stated values.

Non-Modified Phosphorothioates (S-Oligos) (O.D./µg )*
Scale (µmole) Desalt Cartridge HPLC PAGE
0.05 3.5/105 0.7/21 0.7/21 0.35/10.5
0.2 8.4/252 2.1/63 1.75/52.5 0.7/21
1.0 28/840 8.4/252 9.1/273 3.5/105
10 280/8,400 NA 91/2,730 NA
15 420/12,600 NA 133/3,990 NA

*Guarantees are for 20 mers or longer. Oligos shorter than 20 bases will have proportionally fewer ODs.  Microgram amounts are calculated based on a 30 μg/OD value. If the μg/OD value is less than 30, the reported μg value will be proportionally less.  

Shipping Schedule

Scale (µmole) Desalt Cartridge HPLC PAGE
Standard Modifications 3-5 days 3-5 days 5-7 days or less
5-7 days or less
Post-Synthesis Modifications NA
NA 5-10 days or less NA

For complete label license information, please visit sigma.com/oligolicenses.

Materials