ATP-polyamine-biotin is a cell-permeable, efficient kinase cosubstrate with conversions and kinetics similar to those of other known ATP analogues. APB shows a cytotoxicity EC50 value of 19 ± 1 mM. ATP-polyamine-biotin is shown to promote biotin labeling
BFCAs-1 is a polyamine polycarboxylic bifunctional chelating agent (BFCAs) with a broad range of applications in biology, chemistry, medicine and diagnostic imaging.