Native MW of beta-Galactosidase (E. coli)

[Shaun D. Black]

Does anyone have the native (tetrameric) molecular weight of E. coli beta-
galactosidase handy?  Thanks in advance!  Cheers,  Shaun
  =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= 
  = Shaun D. Black, PhD     | Internet:  shaun%jason.decnet at relay.the.net = 
  = Dept. of Biochemistry   | University of Texas Health Center, at Tyler = 
  =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=