>4HQX_2|Chain B[auth C]|SOMAmer SL4|null XXACXGXXACACGCGXXXAXAGCX >4HQX_1|Chain A|Platelet-derived growth factor subunit B|Homo sapiens (9606) SLGSLTIAEPAMIAECKTRTEVFEISRRLIDRTNANFLVWPPCVEVQRCSGCCNNRNVQCRPTQVQLRPVQVRKIEIVRKKPIFKKATVTLEDHLACKCETV