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AbstractThe structure of a new biological redox cofactor topaquinone (TPQ), the quinone of 2,4,5-trihydroxyphenylalanine was elucidated in 1990. TPQ is the cofactor in most copper-containing amine oxidases. It is produced by post-translational modification of a strictly conserved active-site tyrosine residue. Recent work has established that TPQ biogenesis proceeds via a novel self-processing pathway...
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