2173
In consequence , the gpI derived from cells infected with mO74 showed antigenic characteristics similar to those of gpI from VZV - infected cells as determined from the immunoprecipitation pattern , although the molecular weight of each polypeptide was different , and antibody produced in rabbits infected with recombinant virus had a high neutralizing activity , when the reaction was performed with complement .
 gpI, gpI
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 gpI, gpI