Biotin-X-C5-maleimide (N-(biotinoyl)-N’-(iodoacetyl)ethylenediamine) is readily and selectively coupled to thiols.
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CF® Dye & Biotin SE Protein Labeling Kits
This kit contains everything you need to label antibodies or other proteins with a fluorescent CF® dye succinimidyl ester (CF® dye SE) or biotin succinimidyl ester (biotin SE). Each kit contains reagents for three labeling reactions of up to 1 mg protein per reaction.
Fluorescein cadaverine can be coupled to activated carboxy groups or sulfonyl chlorides.
Streptavidin conjugates are prepared from high quality streptavidin biotin binding protein and Biotium's signature bright and photostable fluorescent CF® dyes, and a selection of other labels.
CF® Dye Maleimides
CF® Dye Maleimides are thiol-reactive fluorescent dyes. Maleimides are commonly used to label proteins on free thiol groups.
Anhydrous DMSO (dimethyl sulfoxide; methyl sulfoxide) is recommended for preparing stock solutions of AM ester dyes, reactive dyes and other related moisture-sensitive products.