28565
Inhibition by bisulfite and nitrite at pH 6 . 5 was associated with a marked decrease in the influx Vmax and collapse of the transmembrane proton gradient attributed to the diffusion of the protonated forms into these cells .
 bisulfite, nitrite
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 bisulfite, nitrite