4.2. Glycine, serine, and threonine metabolism
Glycine, serine, and threonine are closely related to the growth of microorganisms,In this metabolism pathway, Glycine, serine, and threonine were metabolized into Guanidinoacetic acid, Pyruvic acid, and L-cysteine respectively. In the HA group, the contents of Pyruvic acid and L-cysteine were upregulated and increased, while the contents of Guanidinoacetic acid were reduced. It was speculated that the activity of metabolizing Glycine into Guanidinoacetic acid was weakened, leading to the reduced production of Guanidinoacetic acid thus Glycine accumulated and increase in content. Xia et al