 The MAM domain is thought to have an adhesive function.It contains 4 conserved cysteine residues, which probably form disulphide bridges.ALK; EGFL6; MAMDC2; MAMDC4; MDGA1; MDGA2; MEP1A; MEP1B; 
NPNT; NRP1; NRP2; PRSS7; PTPRK; PTPRM; PTPRO; PTPRT; 
PTPRU; ZAN