How about the positive controls in test guidelines?
Katherine Neufield wrote in message <89lg1a$gke$1 at news.laserlink.net>...
>>> I was wondering if anyone knows of a relatively common direct-acting
>carcinogen for an Ames test
> However, if you know of a specific and relatively inexpensive and common
compound that could be used for this
>purpose, it would be much appreciated.
>>>
