... four mainbands with molecular masses of approximately 63, 59, 28 and 22 kDa (proteins 1, 2, 3 and 4, respectively) (Fig. 2).The molecular masses of three of these bands (proteins 1, 3 and 4) were ... encoded by the pduCDE genes (60.1, 24.7 and 19.1 kDa for the a, b, c subunit, respectively). All bandswere excised from the gel, digested by trypsin, and their identities were ascertained by mass ... of the pduCDE nucleotide sequence. The threebands at 63, 28 and 22 kDa were identified as PduC, PduD and PduE, respectively.Regarding the fourth band at 59 kDa (Protein 2), we firstsupposed that...