Purity: 98% Appearance:white to off-white powder Packing: aluminum foil bag/bottle,25kg/drum or as your request Uses:A protected cysteine for peptide synthesis. S-Trityl-L-cysteine (STLC) is a tight-binding inhibitor of Eg5 that prevents mitotic progression. It has proven antitumor activity as shown in the NCI 60 tumor cell line screen.