domain 1 ( residues 1-112 ) was most homologous to domain 1 of the heavy chain of human kininogen and domain 2 ( residues 113-225 ) was most homologous to human cystatin s as well as other cystatins and domain 3 of the heavy chain of kininogen , suggesting that the cystatin domains of hrg may represent a hitherto unknown binary form ( or intermediate molecule ) composed of 2 cystatin domains , and evolutionarily intermediate between the cystatin and the kininogen families .
C0086418
human
C1420192
heavy chain