sequence analysis of the 170k , 110k , 87k , 84k , 60k , and 58k proteins revealed the existence of three types of cleavage site in the 200k polyprotein : glutamine-serine ( two sites ) , glutamine-methionine ( one site ) , and glutamine-glycine ( one site ) amino acid pairs .
C0017797
glutamine
C0002520
amino