2831
NH2 -terminal amino acid sequence analysis identified the 140-kDa surface antigen for mAb J393 as CD43/leukosialin , the major sialoglycoprotein of leukocytes .
 ( protein: 140-kDa surface antigen, None) , ( protein: amino acid sequence, None) , ( protein: mAb J393, None) , ( cell type: leukocytes, None) , ( protein: NH2, None) , ( protein: CD43/leukosialin, None) , ( protein: sialoglycoprotein, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: 140-kDa surface antigen, None) , ( protein: amino acid sequence, None) , ( protein: mAb J393, None) , ( cell type: leukocytes, None) , ( protein: NH2, None) , ( protein: CD43/leukosialin, None) , ( protein: sialoglycoprotein, None) 