O-[S-(R)-2-hydroxybutanoylpantetheine-4'-phosphoryl]-L-serine residue
o-[s-(r)-2-hydroxybutanoylpantetheine-4'-phosphoryl]-l-serine residue
An <em>O</em>-(<em>S</em>-acylpantetheine-4'-phosphoryl)serine(1−) residue in which the <em>S</em>-acyl group is specified as (<i>R</i>)-2-hydroxybutanoyl.