May play a role in hematopoiesis. In the cardiovascular system, could regulate growth factors or participate in cell signaling in maintaining large vessel integrity (By similarity). Component of the elastin-associated microfibrils (PubMed:8557636). Interacts with TGFB2. Interacts with BMP2. Interacts with FBN1 (via N-terminal domain) and FBN2. Forms intermolecular disulfide bonds either with other MAGP-2 molecules or with other components of the microfibrils. N- and O-glycosylated. O-glycosylated with core 1 or possibly core 8 glycans. O-glycan heterogeneity at Thr-54: HexHexNAc (major) and HexHexNAc + sulfate (minor). The disease is caused by variants affecting the gene represented in this entry. Belongs to the MFAP family.