L-2-amino-4-chloropent-4-enoate dehydrochlorinase; L-2-amino-4-chloro-4-pentenoate dehalogenase; L-2-amino-4-chloropent-4-enoate chloride-lyase (deaminating); L-2-amino-4-chloropent-4-enoate chloride-lyase (adding H2O; deaminating; 2-oxopent-4-enoat • • •