@article{https://resolver.caltech.edu/CaltechAUTHORS:SPRIjbact96,
    title = "Characterization and nucleotide sequence of pqqE and pqqF in Methylobacterium extorquens AM1",
    journal = "Journal of Bacteriology",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:SPRIjbact96",
    id = "record",
    issn = "0021-9193",
    volume = "178"
}


@article{https://resolver.caltech.edu/CaltechAUTHORS:RAMjbact95,
    title = "Transcriptional analysis of pqqD and study of the regulation of pyrroloquinoline quinone biosynthesis in Methylobacterium extorquens AM1",
    journal = "Journal of Bacteriology",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:RAMjbact95",
    id = "record",
    issn = "0021-9193",
    volume = "177"
}


@article{https://resolver.caltech.edu/CaltechAUTHORS:20120302-074613429,
    title = "Isolation, Phenotypic Characterization, and Complementation Analysis of Mutants of Methylobacterium extorquens AM1 Unable To Synthesize Pyrroloquinoline Quinone and Sequences of pqqD, pqqG, and pqqC",
    journal = "Journal of Bacteriology",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20120302-074613429",
    id = "record",
    issn = "0021-9193",
    volume = "176",
    pmcid = "PMC205263"
}