19509
To better understand the coexistence of acyl - CoA dependent ceramide synthases and ceramidases in the ER we investigated the membrane topology of Ypc1p by probing cysteine accessibility of natural and substituted cysteines with membrane non - permeating mass - tagged probes .
 Chemical: acyl - CoA; Chemical: ceramide; Chemical: ceramidases; Chemical: cysteine; Chemical: cysteines
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: acyl - CoA; Chemical: ceramide; Chemical: ceramidases; Chemical: cysteine; Chemical: cysteines