Exam 6: Protein Function

A mutation of the N-terminal valine in adult hemoglobin occurs. The amino acid is replaced with an isoleucine. Studies show that the replacement does not alter the overall structure of the protein. Which of the following hemoglobin functions may be altered?

The lactose permease from E. coli and the molybdate transporter from Archaeoglobus fulgidus both

The fractional saturation of hemoglobin (Hb) binding to oxygen is illustrated by

Passive transporter proteins allow molecules to move across a membrane in response to

Titin functions to connect __________ to _.

Describe the two functional units of myoglobin that are responsible for O₂ binding. Include the type of chemical bond involved for each binding interaction (i.e., hydrogen bond, covalent bond, electrostatic bond, etc.).

Which of the following is NOT a passive transporter protein?

The transport system shown below is a(n)

Which of the following is NOT a transport protein?

When ATP binds to myosin,

Below is a fractional saturation curve for O₂ binding to adult hemoglobin. Assume that curve Y represents a system at pH 7.4 and with a normal physiological level of 2,3-BPG. Curve X represents a system that

Explain how a mutation in Asp351 of SERCA might alter Ca²⁺ transport.

Phospholamban contains two phosphorylation sites, Ser16 and Thr17. Compare and contrast what directs the phosphorylation at each site and the resulting changes in activity of phospholamban.

Propose how the addition of an inhibitor of the permeability glycoprotein transporter to a chemotherapy drug regimen would alter the effectiveness of the regimen.