In some proteins, an ionic bond may form between an amino acid with

A. a positive R group and an amino acid with a negative R group.
?B. a negative R group and a nonpolar amino acid.
?C. a sulfhydryl group and an amino acid with an amine group.?D. a carboxyl group and an amino acid with a C-terminal.?E. a glycine and another with a tryptophan.


A

Anatomy & Physiology

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 In this view of the olfactory organs, what structure does number 1 indicate?

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