1750
In this study , a site of PDGF - induced tyrosine phosphorylation was mapped to Tyr 138 in the SH3 domain ; Tyr 138 is exposed on the SH3 peptide binding surface .
 GENE: PDGF; GENE: SH3 domain; GENE: SH3 peptide binding surface
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: PDGF; GENE: SH3 domain; GENE: SH3 peptide binding surface