Biotin TS Ethylenediamine

TS biotin ethylenediamine (Biotin ethylenediamine thiosulfate, sodium salt) is a highly selective thiol labeling probe. Similar to the MTS group, TS (thiosulfate) group is capable of reacting with thiols at nearly neutral pH. However, unlike the MTS group , which is neutral, TS is negatively charged and thus probes bearing a TS group are ideal for specifically labeling thiols exposed at the exterior cell surface because charged probes are less likely to enter cells.  It's available in 3 variations: Biotin, Biotin-X, and Biotin-XX. The X and XX spacer should facilitate the interaction between biotin and avidin or streptavidin.  TS Biotin ethylenediamine 

 
• Biotin ethylenediamine thiosulfate, sodium salt 
• C₁₄H₂₃N₄NaO₆S₃ 
• MW: 462.54 
• Off-white solid soluble in DMSO or water 
• Store desiccated at -20°C 

 
• Biotin-X ethylenediamine thiosulfate, sodium salt 
• C₂₀H₃₄N₅NaO₇S₃ 
• MW: 575.7 
• Off-white solid soluble in DMSO or water 
• Store desiccated at -20°C 

 
• Biotin-XX ethylenediamine thiosulfate, sodium salt 
• C₂₆H₄₅N₆NaO₈S₃ 
• MW: 688.86 
• Off-white solid soluble in DMSO or water 
• Store desiccated at -20°C