Chains and heterogens:
PDB Chain Sequences:
>1s3lA (A:) mgsshhhhhhdydipttenlyfqghmkigimsdthdhlpnirkaieifndenvetvihcg dfvslfvikefenlnaniiatygnndgercklkewlkdineeniiddfisveiddlkffi thghhqsvlemaiksglydvviyghthervfeevddvlvinpgeccgyltgiptigildt ekkeyreivl
>1s3lA (A:) mkigimsdthdhlpnirkaieifndenvetvihcgdfvslfvikefenlnaniiatygnn dgercklkewlkdineeniiddfisveiddlkffithghhqsvlemaiksglydvviygh thervfeevddvlvinpgeccgyltgiptigildtekkeyreivl
>1s3lB (B:) mgsshhhhhhdydipttenlyfqghmkigimsdthdhlpnirkaieifndenvetvihcg dfvslfvikefenlnaniiatygnndgercklkewlkdineeniiddfisveiddlkffi thghhqsvlemaiksglydvviyghthervfeevddvlvinpgeccgyltgiptigildt ekkeyreivl
>1s3lB (B:) mkigimsdthdhlpnirkaieifndenvetvihcgdfvslfvikefenlnaniiatygnn dgercklkewlkdineeniiddfisveiddlkffithghhqsvlemaiksglydvviygh thervfeevddvlvinpgeccgyltgiptigildtekkeyreivl