four important factors were observed to be shared by all m protein types examined : ( i ) glutamic acid was the most prevalent amino acid , ( ii ) amino acid molar ratios were similar , ( iii ) each had l-alanine as a single n-terminus , and ( iv ) purified peaks from the column chromatograms still showed heterogeneity while giving type-specific reactivity for multiple bands .
C0002520
amino acid
C0001898
l-alanine