Figure 5:
Interchain hydrogen bonds formed in L-amylin, DRI-amylin and hybrid fibrils. Between L–L and DRI–DRI strands, interchain mainchain hydrogen bonds are formed connecting the i residue from one strand to the i — 1 and i + 1 residue from another strand. In case of a L–DRI interface, the i residue from one strand forms interchain mainchain hydrogen bonds with the i − 1 residue or with the i + 1 residue from another strand. Only backbone atoms are shown for clarity. Oxygen atoms are coloured in red, nitrogen in blue, hydrogens in yellow and Cα and C atom of L-chain is coloured in light green, while that of DRI-chain is coloured in cyan. Note that residues are counted from the C-terminal in DRI chains.