Pyrroloquinoline quinone (4, 5-dihydro(4), 5-dioxo(1) H-pyrroloquinoline-2,7, 9 tricarboxylic acid) being a three ortho cyclic quinone substitutes the role of a redox-cofactor for various bacterial dehydrogenases such as methanol, ethanol and glucose dehydrogenases [1-6] also termed as methotaxin [7]. PQQ structure prediction shows that it has been originated from tyrosine and Glutamic-acid [8]...
