Chains and heterogens:
PDB Chain Sequences:
>1ak4A (A:) mvnptvffdiavdgeplgrvsfelfadkvpktaenfralstgekgfgykgscfhriipgf mcqggdftrhngtggksiygekfedenfilkhtgpgilsmanagpntngsqffictakte wldgkhvvfgkvkegmniveamerfgsrngktskkitiadcgqle
>1ak4B (B:) mvnptvffdiavdgeplgrvsfelfadkvpktaenfralstgekgfgykgscfhriipgf mcqggdftrhngtggksiygekfedenfilkhtgpgilsmanagpntngsqffictakte wldgkhvvfgkvkegmniveamerfgsrngktskkitiadcgqle
>1ak4B (B:) nptvffdiavdgeplgrvsfelfadkvpktaenfralstgekgfgykgscfhriipgfmc qggdftrhngtggksiygekfedenfilkhtgpgilsmanagpntngsqffictaktewl dgkhvvfgkvkegmniveamerfgsrngktskkitiadcgqle
>1ak4C (C:) pivqnlqgqmvhqaisprtlnawvkvveekafspevipmfsalsegatpqdlntmlntvg ghqaamqmlketineeaaewdrlhpvhagpiapgqmreprgsdiagttstlqeqigwmth nppipvgeiykrwiilglnkivrmy
>1ak4D (D:) pivqnlqgqmvhqaisprtlnawvkvveekafspevipmfsalsegatpqdlntmlntvg ghqaamqmlketineeaaewdrlhpvhagpiapgqmreprgsdiagttstlqeqigwmth nppipvgeiykrwiilglnkivrmy