Medium 21 from dry

To make	plates (100 mm)
you'll need:	mL water
add:	g K2HPO4
add:	g KH2PO4
add:	g peptone (Difco Bacto Peptone, not proteose)
add:	g agar
autoclave for:	minutes

If required, add IPTG 0.5mM (0.5 mL 1M per L medium) to 1 mM (1 mL 1M per L medium),

and ampicillin