(S)-4-hydroxy-2-oxopentanoate = (2Z)-2-hydroxypenta-2,4-dienoate + H2O
(s)-4-hydroxy-2-oxopentanoate = (2z)-2-hydroxypenta-2,4-dienoate + h2o
"2-keto-4-pentenoate hydratase"
"2-keto-4-pentenoate hydratase"