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Essential Cell Biology 5th edition

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The Shape and Structure of Proteins

125

transport

protein HPr

lysozyme

catalase

hemoglobin

myoglobin

DNA

deoxyribonuclease

collagen

cytochrome c

porin

chymotrypsin

calmodulin

aspartate

transcarbamoylase

insulin

alcohol

dehydrogenase

5 nm

Figure 4−10 Proteins come in a wide variety of shapes and sizes. Each folded polypeptide is shown as a space-filling model,

represented at the same scale. In the top-left corner is HPr, the small transport protein featured in detail in Figure 4−11. The protein

deoxyribonuclease is shown bound to a portion of a DNA molecule (gray) for comparison.

ECB5 e4.11-4.10

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