1090
We have determined that the mutants define two complementation groups , designated cgs1 + and cgs2 + ( continues to grow in stationary ) .
 cgs1 +, cgs2 +
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 cgs1 +, cgs2 +