8175
Surprisingly , calf thymus CstF contained an additional , novel form of the 64 - kDa subunit with a molecular mass of 70 kDa .
 calf thymus CstF
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 calf thymus CstF