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As a chemist new to the peptide community, there are many choices that have to be made. Which coupling reagents to use? Heat or no heat to promote chemistry? And most importantly, which resin? I have talked previously about resin choices, from loading levels to swelling capacity and how they affect the synthesis outcome. But I haven’t addressed yet a fundamental feature of commercially available resins, and that’s the functional handle to which the peptide chain is conjugated.
In today’s post, I’ll describe some, and I mean only some, of the most commonly used chemical functionalities for Fmoc-based solid phase peptide synthesis and some scenarios in which you would choose one resin type over another.
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