I-L-tryptophan iyi-amino acid ebalulekile etholakala ngokwemvelo emithonjeni eminingi yokudla yamaprotheni aphezulu, njengenkukhu, amaqanda, ushizi, inhlanzi, namanye amantongomane.Njenge-amino acid ebalulekile, kusho ukuthi sidinga ukuthola i-L-tryptophan ngokudla ...
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