6227
Most importantly , the addition of purified 17S U2 snRNPs , but not of 12S U2 snRNPs , to HeLa splicing extracts in which the endogeneous U2 snRNPs have been functionally neutralized with anti - PRP9 antibodies fully restores the mRNA - splicing activity of the extracts .
 GENE: 17S U2 snRNPs; GENE: 12S U2 snRNPs; GENE: endogeneous U2 snRNPs; GENE: anti - PRP9 antibodies
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: 17S U2 snRNPs, 12S U2 snRNPs, endogeneous U2 snRNPs, anti - PRP9 antibodies 
Answer:
 GENE: 17S U2 snRNPs; GENE: 12S U2 snRNPs; GENE: endogeneous U2 snRNPs; GENE: anti - PRP9 antibodies