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Amino acid sequence of the HFi22 protein (GenBank accession no. AY 101610). The homeobox signature is underlined. The Tyr phosphorylation site is denoted by the top line, and the three important amino acids are in italics. The six Leu residues of the three possible Leu zippers are noted in bold. Based on sequence comparisons, three yet unknown amino acids are present between the G at position 1 and the upstream Met (see text).
