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Biochemistry

Is pyrroloquinoline quinone a vitamin? (Reply)

Abstract

Kasahara and Kato reply - Our announcement1 that the redox cofactor pyrroloquinoline quinone (PQQ) is a new vitamin has been challenged as being premature by Felton and Anthony2 and by Rucker et al.3.

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Figure 1: Characterization of the repeated sequences of murine U26 protein (mU26).

References

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Correspondence to Tadafumi Kato.

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Kasahara, T., Kato, T. Is pyrroloquinoline quinone a vitamin? (Reply). Nature 433, E11–E12 (2005). https://doi.org/10.1038/nature03324

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