Berger A, Schechter I (February 1970). "Mapping the active site of papain with the aid of peptide substrates and inhibitors". Philos. Trans. R. Soc. Lond., B, Biol. Sci. 257 (813): 249–64. doi:10.1098/rstb.1970.0024. PMID4399049.
Berger A, Schechter I (February 1970). "Mapping the active site of papain with the aid of peptide substrates and inhibitors". Philos. Trans. R. Soc. Lond., B, Biol. Sci. 257 (813): 249–64. doi:10.1098/rstb.1970.0024. PMID4399049.