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Alignment of DHCR7 amino acid sequences from man (Homo sapiens, H.S., GenBank accession no. AF034544), mouse (Mus musculus, M.M., GenBank accession no. AF057368), and cress (Arabidopsis thaliana, A.T., GenBank accession no. U49398). Identical amino acid residues are shown in bold. Putative transmembrane segments (grey boxes), introns (arrows) and mutated residues found in patients (•) and a healthy control person (○) are indicated.
