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The Functional Domain Structure of Nascent ToxA.
The pre-domain or the signal sequence (S), the pro-region (N-domain), and the mature toxin (C-domain) are labeled. The N and C termini are labeled and so are the first residues of the N- and C-domains. The position of the disulfide formed in mature ToxA is also indicated. The complete sequence of the mature toxin is shown in Figure 3B.
