What is the pI of IgG?

[Brian S. Thoma]

>All,
>
>I have been reading through Maniatias, Current Protocols in Mol. Bio.,
>etc. but I have been unable to find a reference to the pI of IgG. I need
>to find out since I believe I may have a proteoglycan which elutes off of
>DEAE not far after the contaminating IgG.
>
>If anyone can forward a little wisdom it would be greatly appreciated.
>
>Thank you in advance,
>
>Brian Thoma
>Univ. of Texas at San Antonio
>Extracellular Matrix Laboratory