1716
Furthermore , a minor start site was localized 179 bp upstream of the major site using reverse transcriptase - polymerase chain reaction with various P1 primers ( primer walking ) , primer extension , and cDNA cloning .
 GENE: reverse transcriptase
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: reverse transcriptase