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1. |
A mixture contains three similarly sized peptides P, Q and R. The peptide P is positively charged, Q is weakly negative and R is strongly negative. If this mixture is passed through an ion-exchange chromatography column containing an anionic resin, their order of elution will be |
A. | P, Q, R |
B. | R, Q, P |
C. | Q, R, P |
D. | P, Q and R elute together |
Answer» C. Q, R, P | |