Ovaj gen kodira preeksprimirani protein povezan sa rezistencijom na cisplatin (CROP). N-terminalna polovina CROP-a sadrži motive cistein/histidina i leucinska ponavljanja poput patentnih zatvarača, a C-terminalna polovina bogata je arginininskim i glutamatnim ostacima (RE domen) i argininskim i serinskim ostacima (RS domen). Ovaj protein lokalizira se tačkastim obrascem u jedru i mogao bi biti uključen u stvaranje splajsosom, putem RE i RS domena. Pronađene su dvije varijante transkripta kojE kodiraju isti protein ovog gena.[5]
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