DBCO-Sulfo-Link-biotin TEA is a click chemistry intermediate containing a DBCO group, which can undergo ring strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing an azide group.
References:
[1]. Tsujii, et al. Retinoblastoma-binding protein 4-regulated classical nuclear transport is involved in cellular senescence. Journal of Biological Chemistry 290.49 (2015): 29375-29388.