... 3. Autocatalytic cleavage of the mutants S15 3A -PCSK9, Q19 0A -PCSK9, R19 4A -PCSK9, D20 4A -PCSK9, K22 2A -PCSK9, R23 7A -PCSK9, D23 8A -PCSK9, D37 4A -PCSK9, C37 5A -PCSK9, S37 6A -PCSK9, T37 7A -PCSK9, C37 8A -PCSK9 ... other vertebrates.In conclusion, there is a single, large, evolutionarilyconserved protrusion on the surface of the catalyticdomain of PCSK9. The lack of other residue conserva-tion on the ... al. Conserved protrusion on PCSK9 FEBS Journal 275 (2008) 4121–4133 ª 2008 The Authors Journal compilation ª 2008 FEBS 4133 Investigations on the evolutionary conservation of PCSK9 reveal a functionally...