| Figure 1-51 |
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| Four-helix bundle motif | |
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| The four-helix bundle motif can comprise an entire protein domain and occurs in proteins with many different biochemical functions. Shown here is human growth hormone, a signaling molecule; shown in Figure 1-28a is cytochrome b562, an electron-transport protein. In Figure 1-54 the protein myohemerythrin is shown; its function is oxygen transport. |