12588
Here we evaluated whether xenogeneic serum , as a source of xenoreactive natural antibodies and complement, induced endothelial cell activation with consequent leukocyte adhesion under flow conditions.
 protein: xenoreactive natural antibodies
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: xenoreactive natural antibodies 
Answer:
 protein: xenoreactive natural antibodies