2255
Using unidirectional PCR we isolated a 361 - bp 5 ' promoter region and delineated the intronic / exonic boundaries which include a non - coding exon 1 , a single intron , and a coding exon 2 , a structure that is typical of genes of the RNase A superfamily .
 GENE: RNase A superfamily
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: RNase A superfamily