"The functional isoforms of CADM1 SP4 SP1 SP6 and SP3 with alternative splicing between exons 7/11 were detected in human lung mast cells; Expression of mixed isoforms reduces adhesion of mast cells to lung fibroblasts. Mast cells express 4 functional CADM1 isoforms and 2 dysfunctional isoforms"xsd:string