Origin and evolution of lysyl oxidases Scientific Reports GHK Cu South Africa Buy GHK Cu Protopep Protopep Research Peptides File:Tropocollagen cross linkage lysyl oxidase (EN).svg Wikimedia Commons Proteolytic processing of lysyl oxidaselike 2 in the extracellular matrix is required for crosslinking of basement membrane collagen IV Journal of Biological Chemistry Developing functional musculoskeletal tissues through hypoxia and lysyl oxidase induced collagen cross linking PNAS Proteolytic processing of lysyl oxidaselike 2 in the extracellular matrix is required for crosslinking of basement membrane collagen IV Journal of Biological Chemistry