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Organization of protoporphyrinogen oxidases from various origins and clustal-w 1.7 alignment of the peptide sequences of characteristic domains A, B, and J. ATh, Arabidopsis thaliana (34); NT, Nicotiana tabacum (35); HS, Homo sapiens (36); MM, Mus musculus (37); BS, Bacillus subtilis (30); MX, Myxococcus xanthus; SP, Schizosaccharomyces pombe; SC, Saccharomyces cerevisiae (9).
