6776
Two XPG regions with putative NLS [ amino acid ( AA ) coordinates : NLS - B ( AA 1057 - 1074 ) and NLS - C ( AA 1171 - 1185 ) ] were each shown to independently localize the beta - gal extensively ( > 80 % ) to the nucleus of HeLa cells .
 XPG regions, beta - gal
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 XPG regions, beta - gal