Thermo Scientific Pierce Sulfo-SANPAH is a long-arm (18.2 angstrom) crosslinker that contains an amine-reactive N-hydroxysuccinimide (NHS) ester and a photoactivatable nitrophenyl azide.
Crosslinker Application Guide -- search for recent literature references for this product
Overview of crosslinking
Chemistry of crosslinking
Sulfo-LC-SDA – more efficient diazirine analog of Sulfo-SANPAH
Crosslinkers at a glance (selection guide)