11707
The ( two - motif ) domain fold contains a pair of calcium binding sites very similar to those found in a two - domain prokaryotic betagamma - crystallin fold family member , Protein S .
 two - domain prokaryotic betagamma - crystallin fold family member, Protein S
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 two - domain prokaryotic betagamma - crystallin fold family member, Protein S