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. 2023 Dec 19;17(1):15. doi: 10.3390/ma17010015

Figure 2.

Figure 2

(A) The synthesis steps of traditional peptide synthesis method and dimer condensation polymerization method [9]. (B) The process of enzymatic conversion. GTP is glutamine transpeptidase [11]. (C) The process of extraction method. (D) The mechanism of microbial synthesis of γ-PGA.