Multiple sequence alignments of hTFF2 with TFF domain-containing proteins. Sequence alignment of mammalian TFF peptides (TFF), lysosomal α-glucosidase (LYAG), maltase glucoamylase-like protein (MGAL2), maltase glucoamylase (MGA), Xenopus integumentary mucin A.1 (MUA1), and C.1 (MUC1), sucrase-isomaltase (SUIS), putative gastrointestinal growth factors from Xenopus (XP), and zona pellucida glycoproteins (ZP) in ClustalW (1.83). Arrows indicate highly conserved amino acid residues: cysteines (yellow), aromatic residues in loop 3 (blue), other residues (light or dark gray).