has_handle has_reactive_group is_cleavable label transfer reagent cleavable S-S bond biotin Sulfo NHS ester phenyl azide Sulfo-SBED 13.699999809265136719 19.100000381469726562 3 634.20699999999999363 9.1000003814697265625 Sulfo-N-hydroxysuccinimidyl-2-(6-[biotinamido]-2-(p-azido benzamido)-hexanoamido) ethyl-1,3'-dithioproprionate Sulfo-SBED cross-linker. XLMOD XLMOD:03002