Question

Remaining Time: 1 hour, 42 minutes, 31 seconds. Question Completion Status: Use the image below for the following multi-part question, a. For each protein (1-3), identify the type of membrane protein being shown. b. For proteins 1 and 3, identify the type of amino acids you would expect to be present at each of the arrows. Explain your reasoning C. Protein 2 forms a pore in the membrane. How would the properties of the amino acids on the outside of the pere differ from the properta del sene xatund on the master reasoning Protein 2 Protein 3 Protein 1 no

Answer 1

Protein 1 is Intergral protein which contain helical bundle.

Protein 2 is Intergral protein which contain beta barrel.

Protein 3 is Peripheral protein.

Inproteins 1 and 3 middle arrow part have nonpolar amino acids are present. Because the middle arrow part consist of lipid layer. So non polar amino acids form bond with hydrophobic lipid layer.

Upper and down arrow amino acids are polar amino acids, because they are attached to the hydrophilic head of phospholipid bilayer.

The properties of amino acis outside the pore are polar and and inside the pore is non polar. The beta sheets in the protein 2 is formed majorly by non polar amino acids because for the attachment to the membrane.