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| PR:P55826 | protoporphyrinogen oxidase 1, chloroplastic (Arabidopsis thaliana) | | |  | | |
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| PR:P55826-1 | protoporphyrinogen oxidase 1, chloroplastic isoform 1 (Arabidopsis thaliana) | | |  | | |
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| PR:P55826-2 | protoporphyrinogen oxidase 1, chloroplastic isoform 2 (Arabidopsis thaliana) | | |  | | |