Chains and heterogens:
PDB Chain Sequences:
>1kzlA (A:) mftglveaigvvkdvqgtidngfamkieapqilddchtgdsiavngtcltvtdfdryhft vgiapeslrltnlgqckagdpvnleravlsstrmgghfvqghvdtvaeivekkqdgeaid ftfrprdpfvlkyivykgyialdgtsltithvddstfsimmisytqskvimakknvgdlv nvevdqigkyteklveahiadw