>sp|Q9R0X0-3|MED20_MOUSE Isoform 3 of Mediator of RNA polymerase II transcription subunit 20 OS=Mus musculus OX=10090 GN=Med20 MGVTCVSQMPVAEGKSLQQTVELLTKKLEMLGAEKQGTFCVDCETYHTAASTLGSQGNRE EETQPVIM