The research on water-soluble cationic porphyrins has received much interest in recent years. Because of their excellent bioactivity water-soluble cationic porphyrins can be used as potential anticancer or antibacterial agents and probe for structure and dynamics of DNA. Serum albumin is the natural carrier protein for photosensitizers such as porphyrin. Porphyrin molecules were carried to tumour region selectively and were transported into tumour cells by serum albumin. The binding interaction betw...