6526
Pertussis toxin , which ADP -ribosylates the Gi proteins known to couple to the C5a receptor , produced minimal inhibition of C5a -induced IL-8 expression and had little effect on C5a -induced calcium mobilization in RAW264.7 cells .
 protein: IL-8; cell line: RAW264.7 cells; protein: Gi proteins; protein: C5a receptor
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: IL-8, RAW264.7 cells, Gi proteins, C5a receptor 
Answer:
 protein: IL-8; cell line: RAW264.7 cells; protein: Gi proteins; protein: C5a receptor