>4ixkD (D:) observed residues (from ATOM records) seelldlfnrqvtqeftasqvylsasiwfdqndwegmaaymlaesaeerehglgfvdfan krnipielqavpapvscaewsspedvwqsileleqantrsllnlaeaastchdfavmafl npfhlqqvneedkigsilakvtdenrtpgllrsldvvs