A. M. Amin, S. Sismindari, and P. Purwanto, “Expression of Synthetic pac Gene Encoding Penicillin G Acylase (PGA) Enzyme in E. coli BL21(DE3) and HB101”, Curr. Appl. Sci. Technol., vol. 24, no. 3, p. e0258758, Feb. 2024.