At pH 7.0, in what order would the following three peptides be eluted from a column filled with a cation exchange polymer? Give reason(s) for your answer(s) for a full credit.
Peptide A: Ala 10%, Glu 5%, Ser 5%, Leu 10%, Arg 10%, His 5%, Ile 10%, Phe 5%, Lys 10%, Tyr 5%, Gly 10%, Pro 5% and Trp 10%
Peptide B: Ala 5%, Val 5%, Gly 10%, Leu 5%, Asp 5%, Arg 5%, Ile 5%, Phe 5%, Tyr 5%, Trp 5%, Ser 5%, Thr 5%,Glu 5%, Asn 5%, Pro 10%, Met 5% and Cys 5%
Peptide C: Ala 10%, Glu 10%, Gly 5%, Leu 5%, Asp 5%, Arg 5%, Met 5%, Cys 5%, Tyr 5%, His 5%, Val 5%, Pro 5%, Thr 5%, Ser 5%, Asn 5%, and Gln 5%.