5608
The data show conclusively that phosphorylation of His - 304 is not essential for any of the known functions of A . vinelandii NifL .
 A . vinelandii NifL
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 A . vinelandii NifL