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This is a molecular model of the 3-fold channel with the three (3) intersecting subunits represented as ribbons. (In this picture, the ribbons have the same color code as the ribbons in Figure 1 in the main section of this tutorial.) The amino-acid residues lining the channel are shown as CPK models. Notice the polarity of the carboxylate sidechains on the residues lining the 3-fold channel; the polar nature of these sidechains results in this channel being hydrophilic.
Note: The carbon atoms are green, the nitrogen atoms are blue, and the oxygen atoms are red in the CPK model.
To see more about the channels in ferritin, go to the Channels Link.
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