Chains and heterogens:
PDB Chain Sequences:
>1kttA (A:) tfgsgeadcglrplfekksledkterellesyidgr
>1kttA (A:) eadcglrplfekksledkterellesy
>1kttB (B:) ivegsdaeigmspwqvmlfrkspqellcgaslisdrwvltaahcllyppwdknftendll vrigkhsrtryerniekismlekiyihprynwrenldrdialmklkkpvafsdyihpvcl pdretaasllqagykgrvtgwgnlketwtanvgkgqpsvlqvvnlpiverpvckdstrir itdnmfcagykpdegkrgdacegdsggpfvmkspfnnrwyqmgivswgegcdrdgkygfy thvfrlkkwiqkvidqfge
>1kttB (B:) ivegsdaeigmspwqvmlfrkspqellcgaslisdrwvltaahcllyppwdknftendll vrigkhsrtryerniekismlekiyihprynwrenldrdialmklkkpvafsdyihpvcl pdretaasllqagykgrvtgwgnlketgqpsvlqvvnlpiverpvckdstriritdnmfc agykpdegkrgdacegdsggpfvmkspfnnrwyqmgivswgegcdrdgkygfythvfrlk kwiqkvidqfge