Unformatted text preview: charge of R-group. Alanyglycine- only has two pkas -- one from the carboxyl terminal group of of glycine and the amino group of alanine. Ion exchange chromatography is commonly used- cation exchange using resin with sulfonic acid groups attached to it. resin- beads that are insoluble The resin would be cationic- exchange resin. The resin would bind to positively charged molecules (notice the negative charge on the sulfonic group)...
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- Fall '08
- Proteins, carboxyl terminal end, sulfonic group