Sequence alignment of Pex3p with the hypothetical protein Pex3Bp encoded by the Y. lipolytica genome. Amino acid sequences were aligned with the use of the ClustalW program (EMBL-EBI; http://www.ebi.ac.uk/Tools/clustalw2). Identical residues (black) and similar residues (gray) in the two proteins are shaded. Similarity rules: G = A = S; A = V; V = I = L = M; I = L = M = F = Y = W; K = R = H; D = E = Q = N; and S = T = Q = N. Dashes represent gaps. Amino acid numbers are shown on the right.