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The sensitivity of AP - 3 to BFA in cells suggests that its membrane association may be regulated by ARF1 , since BFA inhibits ARF1 guanine nucleotide exchange , and has been shown to prevent ARF1 membrane binding in vitro ( Donaldson et al . , 1992 ; Helms and Rothman , 1992 ; Randazzo et al . , 1993 ) .
 cells, membrane, membrane
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 cells, membrane, membrane