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. 2021 Feb 26;87(6):e02604-20. doi: 10.1128/AEM.02604-20

FIG 5.

FIG 5

Proposed biosynthetic pathway of pseudoalterobactin in HM-SA03. PabI is proposed to function iteratively to incorporate two hydroxyaspartic acid residues into the compound. A lack of hydroxylation enzymes and a presence of 2-isopropylmalate metabolism enzymes indicate the intact incorporation of hydroxyaspartic acid, rather than a downstream (postincorporation) hydroxylation.