1701
Csk ( C - terminal Src kinase ) is a protein tyrosine kinase that phosphorylates Src family member C - terminal tails , resulting in downregulation of Src family members .
 GENE: Csk; GENE: C - terminal Src kinase; GENE: protein tyrosine kinase; GENE: Src family member C - terminal tails; GENE: Src
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: Csk; GENE: C - terminal Src kinase; GENE: protein tyrosine kinase; GENE: Src family member C - terminal tails; GENE: Src