| JM 4 is a four transmembrane protein binding to the CCR 5 receptor . ^^^ Therefore , we analysed the C terminus of CCR 5 and here describe Jena Muenchen 4 ( JM 4 ) , a novel CCR 5 interacting protein . ^^^ JM 4 is membrane associated , co precipitates with CCR 5 , and is ubiquitously expressed . ^^^ JWA , like JM 4 , is a four transmembrane protein , which binds to the CCR 5 receptor . ^^^ |