1956
The NS - 2 isoforms were resolved at a pI value close to 5 . 5 as three groups of unevenly phosphorylated polypeptides , each composed of at least two protein species .
 GENE: NS - 2 isoforms
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: NS - 2 isoforms