The hemopexin and O-glycosylated domains tune gelatinase B/MMP-9 bioavailability via inhibition and binding to cargo receptors. by Van den Steen, P, Van Aelst, I, Hvidberg, V, Piccard, H, Fiten, P, Jacobsen, C, Moestrup, S, Fry, S, Royle, L, Wormald, M, Wallis, R, Rudd, P, Dwek, R, Opdenakker, G