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. 2014 May 21;289(28):19395–19407. doi: 10.1074/jbc.M114.575142

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© 2014 by The American Society for Biochemistry and Molecular Biology, Inc.

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FIGURE 4. — Acceptor recognition by CsaB. A, the chemical properties of the primers used to test the acceptor preference of Δ69-CsaB_co-His₆ are displayed. B, Δ69-CsaB_co-His₆ activity was followed using the spectrophotometric assay in the presence of CPSA_hyd of avDP6 and avDP15 in either native O-acetylated form (CPSA_hyd(OAc)) or after de-O-acetylation (CPSA_hyd(deOAc)). Because earlier studies showed that the non-reducing ends in CPSA_hyd are phosphorylated, samples were additionally tested before and after phosphatase treatment (deP). Samples designated with _(deOAc)-deP were the subject of de-acetylation and de-phosphorylation.