>6k4z_A|type: multi-domain chain
GSAQAVVTQESALTTSPGETVTLTCRSSTGAVTTSNYVNWVQEKPDHLFTGLVYSTNSRVPGVPARFSGSLIGDKAALTITGAQAEDEAIYFCTLWYSNHWVFGGGTKLTVLGQGGGGSGGGGSGGGGSQVQLQQPGAELVKPGASVKLSCKTSGYTFPYYWMHWVNQRPGRGLEWIGRIDPNGGGTRYSEKFKSKATLTVDKPSNTAYMQLSSLTSEDSAVYYCARGKLGQHFDYWGQGTALTVSS
>6k4z_B|type: multi-domain chain
GSAQAVVTQESALTTSPGETVTLTCRSSTGAVTTSNYVNWVQEKPDHLFTGLVYSTNSRVPGVPARFSGSLIGDKAALTITGAQAEDEAIYFCTLWYSNHWVFGGGTKLTVLGQGGGGSGGGGSGGGGSQVQLQQPGAELVKPGASVKLSCKTSGYTFPYYWMHWVNQRPGRGLEWIGRIDPNGGGTRYSEKFKSKATLTVDKPSNTAYMQLSSLTSEDSAVYYCARGKLGQHFDYWGQGTALTVSS
