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Human neutrophil elastase proteolytically activates the platelet integrin alphaIIbbeta3 through cleavage of the carboxyl terminus of the alphaIIb subunit heavy chain .
 alphaIIb subunit heavy chain, platelet integrin, carboxyl terminus, Human neutrophil elastase, alphaIIbbeta3
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 alphaIIb subunit heavy chain, platelet integrin, carboxyl terminus, Human neutrophil elastase, alphaIIbbeta3