NewslettersExtracellular Matrix News Lung Macrophages Utilize Unique Cathepsin K–Dependent Phagosomal Machinery to Degrade Intracellular Collagen By lbeveridge - February 2, 2023 0 Using a quantitative proteomics approach, we identify cathepsins as key determinants of phagosome maturation in primary peritoneum-, lung-, and brain-resident macrophages. [Life Science Alliance] Full Article