A mixture of four peptides, PKKRK, RGERV, RYRGV and LVVYP, is loaded onto an ion-exchange column at pH = 7.2. If carboxymethyl (CM) cellulose is used as the stationary phase of this column, then which peptide elutes first?
1
PKKRK
2
RGERV
3
RYRGV
4
LVVYP
5
Question Not Attempted