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Detection of the cofactor pyrroloquinoline quinone.
van Kleef MA, Dokter P, Mulder AC, Duine JA. van Kleef MA, et al. Anal Biochem. 1987 Apr;162(1):143-9. doi: 10.1016/0003-2697(87)90019-4. Anal Biochem. 1987. PMID: 3300411