Talk:Endy:Preparing Antibiotic Stocks

Chloramphenicol

* Stock concentration - 34mg/ml in 100% Ethanol * Aliquots - 1ml * Working concentration = 25μ/ml (Stringent), 170μ/ml (relaxed)

Are stringent and relaxed the wrong way around...?
 * Jason R. Kelly 07:08, 17 January 2008 (CST): I think it's right. Relaxed plasmids are normally higher copy, so you'd expect a higher concentration of antibiotic for them.
 * hugh kingston 10:16, 4 February 2008 (CST): ok. i did not realise stringent and relaxed were types of plasmid, rather i thought the words referred to the strength of selection for the marker.