The product is a PEGylated recombinant adenosine deaminase. It can be defined molecularly as a genetically modified bovine adenosine deaminase with a modification in cysteine 74 for serine and with about 13 methoxy polyethylene glycol chains bound via carbonyl group in alanine and lysine residues. PEGylated recombinant adenosine deaminase https://www.creativebiomart.net/therapeutic-proteins/p/215/pegylated-recombinant-adenosine-deaminase/