2325
Primer extension experiments indicated that the transcription initiation site mapped to a position on gene IV that was analogous to that reported for the structurally similar P - 450e gene .
 GENE: gene IV; GENE: P - 450e gene
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: gene IV, P - 450e gene 
Answer:
 GENE: gene IV; GENE: P - 450e gene