Proteins of FBS serum granulations and nanobacteria identified by MALDI-TOF mass spectrometry.

aThe values shown for each protein correspond to the number of unique peptides identified for each protein which was divided by the total number of peptides obtained for the first 50 proteins obtained in one sample. This value was then multiplied by 100 to reflect the relative abundance of each protein (see the text for more details).bMW: molecular weight.cSerum granulations (pellets) were obtained from untreated FBS (FBS-1) or following addition of either CaCl2 (FBS-2), Na2HPO4 (FBS-3), or both (FBS-4) as described in the Materials and Methods.dThe different NB samples presented here were all obtained from FBS as described in the Materials and Methods.