9148
Analysis of Msy2 mRNA expression in prepubertal and adult mouse testes , and in isolated populations of germ cells , reveals maximal expression in postmeiotic round spermatids , a cell type with abundant amounts of stored messenger ribonucleoproteins .
 GENE: Msy2 mRNA
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: Msy2 mRNA 
Answer:
 GENE: Msy2 mRNA