David Winterbourne sghk100 at
Wed Feb 5 03:49:10 EST 1997

In article <199702032102.QAA19223 at>, Ivan J Delgado says...
>I have two different antibodies raised against the same protein. When
>I use these on a western, in one case I get a tight band while (antiboby 1)
>and in the other I get a smear of smaller molecular weight bands (antibody 2).

I can think of two possibilities, apart from the possibility of partial 
degradation/proteolytic processing:

1) The band detected by AB1 is fully glycosylated and the smear detected by AB2 
is due to precursor unglycosylated or partially glycosylated molecules.

2) The smear detected by AB2 is due to molecules with increased charge e.g. 

Dr. David Winterbourne
Department of Surgery
St George's Hospital Medical School, London SW17 0RE, England
Tel: 0181-725-5581   Fax: 0181-725-3594

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