7928
Stromelysin - 1 , matrix metalloproteinase - 3 ( MMP - 3 ) , is an important endopeptidase selectively expressed by somatic cells in organ tissues .
 Stromelysin - 1, matrix metalloproteinase - 3, MMP - 3
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Stromelysin - 1, matrix metalloproteinase - 3, MMP - 3