2002
The predicted amino - acid sequence includes an N - terminal signal sequence of 27 amino acids , a 27 amino - acid pro - region , a 251 amino - acid catalytic domain typical of a serine protease with trypsin - like specificity , and a C - terminal hydrophobic extension which is predicted to function as a membrane anchor .
 GENE: serine protease; GENE: trypsin
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: serine protease; GENE: trypsin