(en) M J Kim, D Yamamoto, K Matsumoto, M Inoue, T Ishida, H Mizuno, S Sumiya et K Kitamura, « Crystal structure of papain-E64-c complex. Binding diversity of E64-c to papain S2 and S3 subsites », Biochemical Journal, vol. 287, no Pt 3, , p. 797-803 (PMID1445241, PMCID1133078, lire en ligne)
(en) M J Kim, D Yamamoto, K Matsumoto, M Inoue, T Ishida, H Mizuno, S Sumiya et K Kitamura, « Crystal structure of papain-E64-c complex. Binding diversity of E64-c to papain S2 and S3 subsites », Biochemical Journal, vol. 287, no Pt 3, , p. 797-803 (PMID1445241, PMCID1133078, lire en ligne)