Robin Blumenthal wrote:
>> We are having an interesting problem in our lab with our ELISAs. I was
> wondering if anyone out there might have any ideas.
>> We are doing sandwich ELISAs for cytokines and Igs (both human and murine)
> using a biotin-linked secondary Ab, strep-HRP and OPD as a substrate. The
> problem we are having is that the developing has slowed down incredibly.
> Assays that once took 5 min to develop are now taking over 30 min and
> still not coming all the way up. We are in the process of testing all the
> components but in a latest test two different batches of HRP-strep gave
> the same results. We are a bit stumped.....anyone have any ideas?
>> We would appreciate any ideas!
>> Thank you
>> --
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Robin Blumenthal, Ph.D.
> Department of Pediatrics, Rm S303
> Stanford University
> 300 Pasteur Drive
> Stanford, California 94305
>>robinb at leland.stanford.edu> (650) 723-8224 (650) 498-4632 FAX
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
My first guess is PH
