3107
Moreover , the cell envelope contains several compounds such as wall teichoic acid and capsular polysaccharides that may not be involved in direct signaling to the host cell , but still affect signaling through shielding of other bacterial effector molecules .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None