Alignment of the protein sequences of pancreatic carboxylesterases from Mugil cephalus with that of human pancreatic HCEH. The secondary structure elements of the latter, identified in the known 3D structure (Moore et al., 2001), are indicated above the sequence. Only the sequence of the first 560 amino acids is shown here. The C-terminal end up to residue 753, consisting of proline-rich repeat sequences, is truncated. The signal peptide cleavage site is indicated by a vertical arrow. The three amino acids of the catalytic triad (Ser-Asp-His) are indicated by asterisks. This sequence alignment was obtained and depicted using the Clustal Omega (Sievers et al., 2011) and Espript (Gouet, et al., 2003) programs.