The high molecular weight urinary matrix metalloproteinase (MMP) activity is a complex of gelatinase B/MMP-9 and neutrophil gelatinase-associated lipocalin (NGAL). Modulation of MMP-9 activity by NGAL - Yan, L; Borregaard, N; Kjeldsen, L (J Biol Chem, 2001)
et al.