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 .
 Chemical: bisulfite; Chemical: nitrite
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: bisulfite, nitrite 
Answer:
 Chemical: bisulfite; Chemical: nitrite