Metalloproteases meprin α
and meprin β are C- and N-procollagen proteinases important for collagen assembly and tensile

Broder C, Vadon-Le Goff S, Arnold P, Konerding M, Bahr K, Fisher L W, Müller S, Overall C M, Bond 
J S, Koudelka T, Tholey A, Hulmes D J S, Moali C, Becker-Pauly C (2013); Proc Natl Acad Sci USA, 110:14219-14224. doi: 10.1073/pnas.1305464110