Artefacts on SDS PA gels

[Dima Klenchin]

In article <3uj0os$cqt at news.bu.edu>, mlamkin at acs.bu.edu 
(Mark Lamkin) wrote:
>A while back, some one asked for help in explaining the 
presence of 
>bands on SDS polyacrylamide gels with app. mol. wts. of 
between 50-60 
>KD. As I recall, at least two opinions were provided in 
responses: 1) 
>contamination due to keratin and 2) a contaminant in 
>b-mercaptoethanol.

Please, forward the suggestions to me, too. I can live
with this crap but if there is an easy way to get rid of 
it, I'd like to. 

Thanks. - Dima