This family includes 2,4-dihydroxyhept-2-ene-1,7-dioic acid aldolase and 4-hydroxy-2-oxovalerate aldolase.

1: The bphDEF meta-cleavage pathway genes involved in biphenyl/polychlorinated biphenyl degradation are located on a linear plasmid and separated from the initial bphACB genes in Rhodococcus sp. strain RHA1. Masai E, Sugiyama K, Iwashita N, Shimizu S, Hauschild JE, Hatta T, Kimbara K, Yano K, Fukuda M; Gene 1997;187:141-149. PMID:9073078

2: Sequence of the Escherichia coli C homoprotocatechuic acid degradative operon completed with that of the 2,4-dihydroxyhept-2-ene-1,7-dioic acid aldolase-encoding gene (hpcH). Stringfellow JM, Turpin B, Cooper RA; Gene 1995;166:73-76. PMID:8529896