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| PR:Q8AYC9-1 | serine/threonine-protein kinase Chk1 isoform 1 (chicken) | | |  | | |
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| PR:O14757-1 | serine/threonine-protein kinase Chk1 isoform 1 (human) | | |  | | |
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| PR:O35280-1 | serine/threonine-protein kinase Chk1 isoform 1 (mouse) | | |  | | |
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| PR:Q91ZN7-1 | serine/threonine-protein kinase Chk1 isoform 1 (rat) | | |  | | |