Vitamin C is required for prolyl hydroxylase to function. Prolyl hydroxylase enzyme activity is necessary for the proper biosynthesis of collagen. Which of the following might result from a deficiency in vitamin C?
A proposed structure of a bacterial membrane protein shows that the distance between successive amino acids in a region crossing the membrane is 3.4 Å. Recall that a typical lipid bilayer is approximately 40 Å across. Which of the following is the most likely description of the protein?
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