Do you know what the Isoelectric point and Mr of E.coli proteins is?

A 2-D plot of observed pI and Mr of E.coli proteins

Did you know that 90 % of abundant proteins (364 proteins) of the E.coli proteome are acidic (pI 4-7) with molecular weights between 10-100 kDa
Reference: Link, Robison & Church (1997) Electrophoresis 18, 1259-1315