6571
Retroviral replication requires that a portion of the primary transcripts generated from proviral DNA be spliced to serve as mRNA for the envelope protein and in Rous sarcoma virus as src mRNA .
 GENE: envelope protein; GENE: src 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: envelope protein, src mRNA 
Answer:
 GENE: envelope protein; GENE: src mRNA