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In this spacefilling-view, residues are colored according to the following scheme: Lysine colored Blue To find ion pairs it may be necessary to measure the distance between the Oxygen of a negative group and the Nitrogen of a positive group, to verify that they are within 3-4 Angstroms. This is done in Jmol by double-clicking the first atom. Then find the next atom, and the distance is shown on screen. In the pop-up menu, under measurement the units can be changed. There are at least two complex or network ion pairs, with 3 or more centers. Find one. Find another ion pair between 2 residues in the same alpha-helix. Find another ion pair between 2 residues in different alpha-helices. Find another ion pair between 2 residues in the same beta-strand. Find another ion pair between 2 residues in different beta-strands. Next: Glycines |