thu:AC731_004715 K06139 PqqA peptide cyclase [EC:1.21.98.4] | (GenBank) pyrroloquinoline quinone biosynthesis protein PqqE thu:AC731_004710 K06138 pyrroloquinoline quinone biosynthesis protein D | (GenBank) pyrroloquinoline quinone biosynthesis protein PqqD thu:AC731_004705 K06137 pyrroloquinoline-quinone synthase [EC:1.3.3.11] | (GenBank) pyrroloquinoline quinone biosynthesis protein C