30051
We report that engagement of the ACR D6 by its ligands activates a beta - arrestin1 - dependent , G protein - independent signaling pathway that results in the phosphorylation of the actin - binding protein cofilin through the Rac1 - p21 - activated kinase 1 ( PAK1 ) - LIM kinase 1 ( LIMK1 ) cascade .
 None
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:  
Answer:
 None