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soft agar colony counting - (Aug/01/2007 )

I'm doing soft agar assay but I would like your advice how to count colonies at the very end.It is really hard to distinguish between dead/fragmented or splashed cells and actual colonies. I want to use dye that 'will see' difference in dead or alive cells so I thought about trypan blue. I know some people used also 0.4% crystal violet to count colonies. What do you suggest? Thanks in advance

-double choca-

what type of cells are you counting?


You could use a live-dead assay with fluorescein diacetate or Calcein-AM and PI. There's a protocol here that might be useful for you. I've used it to estimate colony growth in alginate hydrogel beads.


QUOTE (aimikins @ Aug 1 2007, 05:47 PM)
what type of cells are you counting?

These are 3T3 or Rat2 fibroblasts

-double choca-