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| PR:P18616 | DNA-directed RNA polymerase II subunit RPB1 (Arabidopsis thaliana) | | |  | | |
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| PR:P04052 | DNA-directed RNA polymerase II subunit RPB1 (fruit fly) | | |  | | |
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| PR:P24928 | DNA-directed RNA polymerase II subunit RPB1 (human) | | |  | | |
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| PR:000068532 | DNA-directed RNA polymerase II subunit RPB1 cysteinylated 1 (human) | | |  | | |
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| PR:000070943 | DNA-directed RNA polymerase II subunit RPB1 cysteinylated 2 (human) | | |  | | |
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| PR:000076592 | DNA-directed RNA polymerase II subunit RPB1 cysteinylated 3 (human) | | |  | | |
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| PR:000065812 | DNA-directed RNA polymerase II subunit RPB1 deaminated 1 (human) | | |  | | |
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| PR:000069055 | DNA-directed RNA polymerase II subunit RPB1 deaminated 2 (human) | | |  | | |
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| PR:000069309 | DNA-directed RNA polymerase II subunit RPB1 deaminated 3 (human) | | |  | | |
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| PR:000071132 | DNA-directed RNA polymerase II subunit RPB1 deaminated 4 (human) | | |  | | |
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| PR:000076360 | DNA-directed RNA polymerase II subunit RPB1 deaminated 5 (human) | | |  | | |
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| PR:000082168 | DNA-directed RNA polymerase II subunit RPB1 deaminated 6 (human) | | |  | | |
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| PR:000082181 | DNA-directed RNA polymerase II subunit RPB1 deaminated 7 (human) | | |  | | |
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| PR:000084462 | DNA-directed RNA polymerase II subunit RPB1 deaminated 8 (human) | | |  | | |
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| PR:P24928-1 | DNA-directed RNA polymerase II subunit RPB1 isoform 1 (human) | | |  | | |
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| PR:P24928-2 | DNA-directed RNA polymerase II subunit RPB1 isoform h2 (human) | | |  | | |
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| PR:000069563 | DNA-directed RNA polymerase II subunit RPB1 methylated 1 (human) | | |  | | |
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| PR:000072711 | DNA-directed RNA polymerase II subunit RPB1 methylated 2 (human) | | |  | | |
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| PR:000075205 | DNA-directed RNA polymerase II subunit RPB1 methylated 3 (human) | | |  | | |
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| PR:000048846 | DNA-directed RNA polymerase II subunit RPB1 phosphorylated 1 (human) | | |  | | |
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| PR:000048847 | DNA-directed RNA polymerase II subunit RPB1 phosphorylated 2 (human) | | |  | | |
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| PR:000048848 | DNA-directed RNA polymerase II subunit RPB1 phosphorylated 3 (human) | | |  | | |
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| PR:000048849 | DNA-directed RNA polymerase II subunit RPB1 phosphorylated 4 (human) | | |  | | |
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| PR:000085867 | DNA-directed RNA polymerase II subunit RPB1 phosphorylated 5 (human) | | |  | | |
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| PR:000085891 | DNA-directed RNA polymerase II subunit RPB1 phosphorylated 6 (human) | | |  | | |
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| PR:000085902 | DNA-directed RNA polymerase II subunit RPB1 phosphorylated 7 (human) | | |  | | |
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| PR:000085941 | DNA-directed RNA polymerase II subunit RPB1 phosphorylated 8 (human) | | |  | | |
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| PR:000062835 | DNA-directed RNA polymerase II subunit RPB1 phosphorylated and ubiquitinated 1 (human) | | |  | | |
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| PR:000048850 | DNA-directed RNA polymerase II subunit RPB1 phosphoserine(3+) form (human) | | |  | | |
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| PR:P08775 | DNA-directed RNA polymerase II subunit RPB1 (mouse) | | |  | | |
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| PR:P08775-1 | DNA-directed RNA polymerase II subunit RPB1 isoform 1 (mouse) | | |  | | |
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| PR:P16356 | DNA-directed RNA polymerase II subunit RPB1 (worm) | | |  | | |
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| PR:P04050 | DNA-directed RNA polymerase II subunit RPB1 (yeast) | | |  | | |
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| PR:000039128 | DNA-directed RNA polymerase II subunit RPB1 isoform 1 | | |  | | |
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| PR:P24928-1 | DNA-directed RNA polymerase II subunit RPB1 isoform 1 (human) | | |  | | |
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| PR:P08775-1 | DNA-directed RNA polymerase II subunit RPB1 isoform 1 (mouse) | | |  | | |
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| PR:P35084 | DNA-directed RNA polymerase II subunit rpb1 (Dictyostelium discoideum) | | |  | | |
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| PR:P36594 | DNA-directed RNA polymerase II subunit rpb1 (Schizosaccharomyces pombe 972h-) | | |  | | |
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| PR:000044736 | DNA-directed RNA polymerase II subunit rpb1 (Schizosaccharomyces pombe) | | |  | | |
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| PR:P36594 | DNA-directed RNA polymerase II subunit rpb1 (Schizosaccharomyces pombe 972h-) | | |  | | |
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| PR:000050494 | DNA-directed RNA polymerase II subunit rpb1 CTD-phosphorylated form (Schizosaccharomyces pombe) | | |  | | |
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| PR:000085738 | DNA-directed RNA polymerase II subunit rpb1 phosphorylated 1 (Schizosaccharomyces pombe) | | |  | | |
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| PR:000044737 | DNA-directed RNA polymerase II subunit rpb1 phosphorylated 3 (Schizosaccharomyces pombe) | | |  | | |
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| PR:000085737 | DNA-directed RNA polymerase II subunit rpb1 phosphorylated 4 (Schizosaccharomyces pombe) | | |  | | |
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| PR:000044738 | DNA-directed RNA polymerase II subunit rpb1 phosphorylated 5 (Schizosaccharomyces pombe) | | |  | | |
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| PR:000044739 | DNA-directed RNA polymerase II subunit rpb1 phosphorylated 6 (Schizosaccharomyces pombe) | | |  | | |
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| PR:000064868 | DNA-directed RNA polymerase II subunit rpb1 phosphorylated 7 (Schizosaccharomyces pombe) | | |  | | |
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| PR:000044740 | DNA-directed RNA polymerase II subunit rpb1 CTD-unphosphorylated form (Schizosaccharomyces pombe) | | |  | | |