1345
In short - term cotransfections , a pFRTK - CAT target containing EBNA - 1 - binding sites from the EBV origin of plasmid replication , ori - P , was transactivated by a carboxy - terminal EBNA - 1 construction ( amino acids 450 to 641 ) that also carried a c - myc nuclear localization signal .
 pFRTK, CAT, EBNA - 1 - binding sites, ori - P, carboxy - terminal EBNA - 1 construction, c - myc nuclear localization signal
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 pFRTK, CAT, EBNA - 1 - binding sites, ori - P, carboxy - terminal EBNA - 1 construction, c - myc nuclear localization signal