xenobiotic degradation aromatic compound degradation 4-chlorobenzoate degradation pathway UPa:UPA01011 KEGG:map01110 KEGG:map01120 KEGG:map00364 KEGG:map00130 KEGG:map01100 KEGG:map00362 4-chlorobenzoic acid degradation 4-CBA degradation MetaCyc:PWY-6215 PMID:7765837 Degradation of 4-chlorobenzoate (4-CBA) by certain soil bacteria. 4-chlorobenzoate is not known to be a natural product but is introduced in the environement through its use as a precursor in the synthesis of dye stuffs, pigments and pharmaceuticals.