?:definition
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Isoenergetic transfer of URM1 from one protein to another via the reaction X-URM1 + Y -> Y-URM1 + X, where both the X-URM1 and Y-URM1 linkages are thioester bonds between the C-terminal amino acid of URM1 and a sulfhydryl side group of a cysteine residue. [GOC:dph]
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