6092
APLF , in turn , functions as a scaffold protein and promotes the recruitment and / or retention of XRCC4 - Lig4 and XLF , thereby assembling multi - protein Ku complexes capable of efficient DNA ligation in vitro and in cells .
 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