In rate sedimentation, generally speaking, a heavier protein will sediment more rapidly than a lighter protein, and the heavier protein will have the higher "S" value. But Tropomyosin from muscle fibers, with a 93 kd molecular weight, has a coefficient of 2.6 S, and hemoglobin, at 65 kd molecular weight, has a coefficient of 4.3 S. Which explanation of this data makes most sense.

In rate sedimentation, generally speaking, a heavier protein will sediment more rapidly than a lighter protein, and the heavier protein will have the higher "S" value. But Tropomyosin from muscle fibers, with a 93 kd molecular weight, has a coefficient of 2.6 S, and hemoglobin, at 65 kd molecular weight, has a coefficient of 4.3 S. Which explanation of this data makes most sense.

In rate sedimentation, generally speaking, a heavier protein will sediment more rapidly than a lighter protein, and the heavier protein will have the higher "S" value. But Tropomyosin from muscle fibers, with a 93 kd molecular weight, has a coefficient of 2.6 S, and hemoglobin, at 65 kd molecular weight, has a coefficient of 4.3 S. Which explanation of this data makes most sense.




A. Tropomyosin has many more subunits than Hemoglobin
B. Tropomyosin is strongly charged, and Hemoglobin is neutral
C. Tropomyosin is more spherical then Hemoglobin
D. Tropomyosin is rod-shaped, and Hemoglobin is spherical
E. Tropomyosin is actually smaller, the molecular weight is wrong



Answer: D