Re: [ccp4bb] AW: [ccp4bb] removal of sulfate ion from the active site

2007-05-28 Thread Marius Schmidt
Exactly, solving the equation is necessary to estimate the required concentration Set up the eqn., use large volume (1mL) for soaking solution and small volume (1microL) for the crystal: therefore C(free) ~ C(total), simplify, solve for bound ligand in crystal. Thats all. And I can tell you: st

Re: [ccp4bb] AW: [ccp4bb] removal of sulfate ion from the active site

2007-05-25 Thread Edward Berry
In those old chemical kinetics courses it was explicitly or implicitly clear that [I] refers to I(free), not I(total). The way assays are usually run, [E]< think about your old chemical kinetics courses. what counts is concentration and not amount. M Dear Marius and others, here I would like t

Re: [ccp4bb] AW: [ccp4bb] removal of sulfate ion from the active site

2007-05-25 Thread Marius Schmidt
think about your old chemical kinetics courses. what counts is concentration and not amount. M > Dear Marius and others, > here I would like to comment: The problem with soaking is often not > so much the concentration of the ligand, but the amount of ligand > needed to fill all binding sites in