DNA ladder

2010-03-03 Thread umwong25
Hi everyone, I recently ran a 2-8% gradient polyacrylamide gel. The 1kb Plus DNA ladder had multiple bands. Does anyone know what might have caused this and how to prevent it? I suspect that I might be caused by the freeze thaw cycle. Also, some of my bands of my PCR samples were slanted

histochoice

2010-03-03 Thread Pow Joshi
Hi Everyone, I was just wondering if anyone would have some "Insider's" knowledge about the fixative "Histochoice". It is supposed to be a swanky non-formalin based fixative for all and sundry, and the ingredients are supposed to be "undisclosed" :). I am guessing it is some kind of methanol/aceto

RE: anti-phospho S, T & Y antibodies

2010-03-03 Thread Jayakumar, R
We routinely do phosphotyrosine blots (human proteins) with anti-phosphotyrosine antibody clone 4G10 (many companies sell this). This is the best and most cited antibody for phosphotyrosine and the most specific too. It is of course not specific to any particular protein. Jay -Origi

Re: anti-phospho S, T & Y antibodies

2010-03-03 Thread WS
Hi Priscila, Phosphotyrosine may be quite easily detected; for a start, the PY20 antibody is a good choice. pS and pT are very tricky when you do not know the context (motif) or the identity of the modified protein, as pS and pT are not well recognized by antibodies against the phosphorylated amin

Re: method for membrane receptor extraction

2010-03-03 Thread WS
Hi Ketut, if you can't find any special procedure for your receptor in the literature, I'd try simple fractionation: first, disrupt your cells in a buffer that does not contain detergents. This will remove the cytosol. Remainder should be able for recovery at 15.000g. Wash the pellet a few times

method for membrane receptor extraction

2010-03-03 Thread ketut gunarta
Hello all, I have to isolate G-PCR (G-protein coupled receptor) from ovarian cancer cell line. I am looking for a protocol (buffer,etc) that not use extraction/isolation kit (I could mix the buffer by my self) and not change its native structure. There is a problem that my ultracentrifuge only c

anti-phospho S, T & Y antibodies

2010-03-03 Thread Priscila Peña Diaz
Dear All: I've been looking recently into phosphorylation of certain membrane proteins after a peptide antibody (specific for my protein of interest) fails to recognize the protein without prior treatment of the membrane (blotted proteins) with phosphatase. Most of the phosphorylation assays are