Common Stock Solutions

• Ampicillin - Dissolve 50 mg in 800 $\mu$L water. Volume to 1 mL. Store at -20$\degree$C.

• 1 M CaCl2 - Dissolve 147 CaCl2-2H2O in 500 mL water. Volume to 1 L.

• 1 M imidazole - Dissolve 68.077 g imidazole to a volume of 1 L.

• 5 M NaCl - Dissolve 292 g NaCl in 600 mL water. Volume to 1 L.