Chains and heterogens:
PDB Chain Sequences:
>1sk9A (A:) skscdtvdlgyqcspatshlwgqyspffsledelsvssklpkdcritlvqvlsrhgaryp tsskskkykklvtaiqanatdfkgkfaflktynytlgaddltpfgeqqlvnsgikfyqry kalarsvvpfirasgsdrviasgekfiegfqqakladpgatnraapaisviipesetfnn tldhgvctkfeasqlgdevaanftalfapdiraraekhlpgvtltdedvvslmdmcsfdt vartsdasqlspfcqlfthnewkkynylqslgkyygygagnplgpaqgigftneliarlt rspvqdhtstnstlvsnpatfplnatmyvdfshdnsmvsiffalglyngteplsrtsves akeldgysaswvvpfgarayfetmqcksekeplvralindrvvplhgcdvdklgrcklnd fvkglswarsggnwgecfs
>1sk9A (A:) cdtvdlgyqcspatshlwgqyspffsledelsvssklpkdcritlvqvlsrhgaryptss kskkykklvtaiqanatdfkgkfaflktynytlgaddltpfgeqqlvnsgikfyqrykal arsvvpfirasgsdrviasgekfiegfqqakladpgatnraapaisviipesetfnntld hgvctkfeasqlgdevaanftalfapdiraraekhlpgvtltdedvvslmdmcsfdtvar tsdasqlspfcqlfthnewkkynylqslgkyygygagnplgpaqgigftneliarltrsp vqdhtstnstlvsnpatfplnatmyvdfshdnsmvsiffalglyngteplsrtsvesake ldgysaswvvpfgarayfetmqcksekeplvralindrvvplhgcdvdklgrcklndfvk glswarsggnwgecf