Figure 2.

Kyte–Doolittle hydrophilicity plot of the deduced amino acid sequence of the A33 antigen. Several structural features are indicated: the presence of an N-terminal hydrophobic region likely to correspond to a signal sequence, a more distal highly hydrophobic sequence consistent with the presence of a single-span transmembrane domain, and a highly polar C-terminal region consistent with an intracellular location for this part of the molecule.