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(a) The intramolecular and intermolecular hydrogen bonds for S-protein. (a). Bond order vs bond length showing the intramolecular hydrogen bonding for the seven structural domains. (b) Potential intermolecular HBs (red dots) between domains. (c) 90° orientation of (b). (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
