SD SD minus nitrogen synthetic dextrose minus nitrogen synthetic dextrose minimal medium minus nitrogen A synthetic minimal media used for yeast nitrogen starvation experiments; It contains yeast nitrogen base (lacking ammonium sulfate), glucose, distilled water, salts, trace elements and vitamins, to which various growth supplements can be added back, such as one or more amino acids. It can be used as a solid medium with the incusion of agar. http://www.ncbi.nlm.nih.gov/pubmed/12073320 http://openwetware.org/wiki/SD Sirarat Sarntivijai