Hi, in the protocol we have in the lab we always fix mECS by adding 1% FA solution (diluted in PBS) directly on cells attached to the plate. We leave it 10mins RT with gentle shaking and we quench with TrisHCl 1M pH 7,6. I would like to start to fix cells in solution - so after detaching them from the plate, and counting because I would like to standardise the number of cells that we use for each assay. As I am a little unsure about the volumes in which I should collect and fixate my cells, can anyone recommend a protocol?