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Amino acid sequences of cytoplasmic domains of ζ, CD3ε, FcεRIγ, CD3δ, CD3γ, Igα and Igβ. The sequence positions with negatively charged amino acid residues are shown by “-”, and the positions with positively charged amino acid residues are shown by “+”. ITAM domains are underlined. ITAM Tyr residues are indicated in bold.
