out of 20 amino acid oligomers studied , ( ala ) 6 , ( asn ) 6 , ( cys ) 7 , ( gln ) 7 , ( his ) 6 , ( ser ) 6 , and ( thr ) 6 leaders were the most effective , with the yield of proinsulin ranging between 6 % and 26 % of the total bacterial protein .
C0002520
amino acid
C0017797
gln