1357
Highly conserved regions called src homology 2 and 3 ( SH2 and SH3 ) , comprising amino acid residues 88 to 250 , are believed to modulate the protein - tyrosine kinase activity present in the carboxy - terminal halves of the src proteins .
 GENE: src homology 2; GENE: SH2; GENE: SH3; GENE: protein - tyrosine kinase; GENE: src proteins
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: src homology 2; GENE: SH2; GENE: SH3; GENE: protein - tyrosine kinase; GENE: src proteins