Chains and heterogens:
PDB Chain Sequences:
>1f4tA (A:) mydwfsemrkkdpvyydgniwqvfsyrytkevlnnfskfssdltgyherledlrngkirf diptrytmltsdpplhdelrsmsadifspqklqtletfirettrslldsidpreddivkk lavplpiiviskilglpiedkekfkewsdlvafrlgkpgeifelgkkyleligyvkdhln sgtevvsrvvnsnlsdieklgyiillliagnetttnlisnsvidftrfnlwqrireenly lkaieealrysppvmrtvrktkervklgdqtieegeyvrvwiasanrdeevfhdgekfip drnpnphlsfgsgihlclgaplarleariaieefskrfrhieildtekvpnevlngykrl vvrlksn
>1f4tB (B:) mydwfsemrkkdpvyydgniwqvfsyrytkevlnnfskfssdltgyherledlrngkirf diptrytmltsdpplhdelrsmsadifspqklqtletfirettrslldsidpreddivkk lavplpiiviskilglpiedkekfkewsdlvafrlgkpgeifelgkkyleligyvkdhln sgtevvsrvvnsnlsdieklgyiillliagnetttnlisnsvidftrfnlwqrireenly lkaieealrysppvmrtvrktkervklgdqtieegeyvrvwiasanrdeevfhdgekfip drnpnphlsfgsgihlclgaplarleariaieefskrfrhieildtekvpnevlngykrl vvrlksn