Question

A transmembrane protein has 1000 amino acids. The fifth amino acid is found on the
external surface of the cell membrane. It interacts with the aqueous environment outside the
cell. Amino acids 25 and 205 are covalently bonded to each other and are required to give
the protein its three-dimensional shape. Amino acid 554 is found on the outer surface of the
protein, but it is deep in the interior of the membrane. Amino acid 979 is found on the
external surface of the protein, where it forms a weak ionic bond with a chloride ion. Can
you identify each of the numbered amino acids by structural group and name? Please note
that there may be more than one specific amino acid possible in some cases

Answer 1

The amino acids are polar (position 5); polar and uncharged (25); polar and uncharged (205); cysteine (554); and polar charged (979).

What are amino acids?

Amino acids are the building block of proteins, which may have structural or enzymatic functions.

Amino acids have specific physicochemical properties depending on the nature of their R groups (e.g., polar, charged, etc)

In conclusion, the amino acids are polar (position 5); polar and uncharged (25); polar and uncharged (205); cysteine (554); and polar charged (979).

Learn more about amino acids here:

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