Figure 2.
Representative structures of the precursors of (A) scorpion (C. noxius) bifunctional PAM and mono-functional PHMm and PALm; (B) mammalian (R. norvegicus) PAM-1 and PAM-2 isoforms; (C) monofunctional PHMm, PAL1m and PAL2m in D. melanogaster. Structural and sequence features are indicated as: SP, Signal peptide; PP, Propeptide; MSD, Membrane Spanning Domain; CD, Cytosolic Domain; KK, RK, KR and RR, putative proprotein convertase cleavage sites at basic dyads; G, predicted glycosylation site; PHMcc, catalytic core of the PHM domain.