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Structure of 207305-97-3
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Alkyne-A-DSBSO (alkyne-tagged, acid-cleavable disuccinimidyl bissulfoxide) Crosslinker is a homobifunctional, membrane-permeable, enrichable disulfoxide-containing crosslinker for analysis of protein-protein interactions (PPIs) through crosslinking mass spectrometry (XL-MS). Alkyne-A-DSBSO possesses two N-hydroxysuccinimide (NHS) ester groups for targeting amines, a 14 spacer length, two symmetrical acid-cleavable C-S bonds, and a central bioorthogonal azide tag. After reacting with lysine (Lys) residues, the alkyne tag permits selective enrichment of crosslinked proteins or peptides with a biotin-conjugated azide probe to enhance their detection. Additionally, the post-cleavage spacer yields tagged peptides for unambiguous identification by collision-induced dissociation in tandem MS. Alkyne-A-DSBSO Crosslinker has mapped in vivo PPIs for target protein complexes and whole proteomes from living cells. It will also be a useful proteomics tool in the quest for targeting undruggable protein targets.
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Lot numbers can be found on the outside label of a product: