%0 Journal Article %T Determination of pyrroloquinoline quinone by enzymatic and LC-MS/MS methods to clarify its levels in foods %A Kato, Chikara %A Kawai, Emiko %A Shimizu, Naoki %A Mikekado, Tsuyoshi %A Kimura, Fumiko %A Miyazawa, Teruo %A Nakagawa, Kiyotaka %J PLoS ONE %V 13 %N 12 %D 2018-12-21 %I Public Library of Science %~ DeepDyve