Tertiary (gelatinase) granules are part of a continuum of peroxidase-negative granules formed in myelocytes, metamyelocytes, band cells and segmented neutrophils. They differ from secondary granules by having a low content of antimicrobial substances, and are more readily exocytosed (Sengelov et al. 1995). Tertiary granules are primarily a reservoir of extracellular matrix degrading enzymes and membrane receptors that are required for neutrophil extravasation and diapedesis (Faurschou & Borregaard 2003).
Heegaard, NH, Rørvig, S, Borregaard, N, Østergaard, O
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