Pawitan, Jeanne Adiwinata, Hiroshi Morioka, Satoshi Nishikawa, and Seiichi Uesugi. 1992. “Introducing a Third Disulfide Bond to Ribonuclease T1 and Expression of the Mutant Protein Using the Fusion Protein Method”. Medical Journal of Indonesia 1 (1), 12-9. https://doi.org/10.13181/mji.v1i1.3521.