Skip to main content
. Author manuscript; available in PMC: 2012 Jun 10.
Published in final edited form as: Biochem Biophys Res Commun. 2011 May 12;409(3):526–531. doi: 10.1016/j.bbrc.2011.05.038

Fig. 2. Identification of intramolecular isopeptide bonds (IPBs) between Lys63-Asn214 (IPB1) and Lys243-Asn273 (IPB2) of S. pneumoniae PitB.

Fig. 2

MS/MS spectra of IPB1-containing parent ion 1092.64+ m/z (mass to charge ratio) (A) and IPB2-containing parent ion 609.42+ m/z (B). The peptides corresponding to the y-ions are indicated. (C) Exact mass determination of recombinant PitB and IPB-derivatives.