25551
When PMF is added to cultures of the bacterial species Escherichia coli ( Gram negative ) and Lactobacillus plantarum ( Gram positive ) , which have different cell wall structures , a catalytic current mediated by PMF is observed .
 Chemical: PMF; Chemical: PMF
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: PMF; Chemical: PMF