>1szhB (B:) observed residues (from ATOM records) ltkelikdaaekcctrnrqeccieimkfgtpircgydrdpklpgyvykclqnvlfakepk kkinlddsvccsvfgndqedsgrrcenrcknlmtspsidaatrldsikscslldnvlykc fekcrslrkdgikievlqfeeyc