KCTC Media No. 1052 : Magntospirillum medium

조성	용량	단위
Vitamin solution	10.0	ml
조성 용량 단위 Biotin 2.0 mg Folic acid 2.0 mg Pyridoxine-HCl 10.0 mg Thiamine-HCl x 2 H2O 5.0 mg Riboflavin 5.0 mg Nicotinic acid 5.0 mg D-Ca-pantothenate 5.0 mg Vitamin B12 0.1 mg p-Aminobenzoic acid 5.0 mg Lipoic acid 5.0 mg Distilled water 1.0 L
Trace elements	5.0	ml
조성 용량 단위 Nitrilotriacetic acid 1.5 g MgSO4 x 7 H2O 3.0 g MnSO4 x H2O 0.5 g NaCl 1.0 g FeSO4 x 7 H2O 0.1 g CoSO4 x 7 H2O 0.18 g CaCl2 x 2 H2O 0.1 g ZnSO4 x 7 H2O 0.18 g CuSO4 x 5 H2O 0.01 g KAl(SO4)2 x 12 H2O 0.02 g H3BO3 0.01 g Na2MoO4 x 2 H2O 0.01 g NiCl2 x 6 H2O 0.03 g Na2SeO3 x 5 H2O 0.3 g Distilled water 1.0 L First dissolve nitrilotriacetic acid and adjust pH to 6.5 with KOH, then add minerals. Final pH 7.0 (with KOH).
Fe(III) quinate Solution, 0.01 M	2.0	ml
조성 용량 단위 FeCl3 x 6 H2O 0.45 g Quinic acid 0.19 g Distilled water 100 ml
Resazurin	0.5	mg
KH2PO4	0.68	g
NaNO3	0.12	g
Na-thioglycolate	0.05	g
L(+)-Tartaric acid	0.37	g
Succinic acid	0.37	g
Na-acetate	0.05	g
Agar (for semi-solid agar)	1.30	g
Distilled water	1.0	L

** ph : 6.75

** memo : Ferric Quinate was replaced by Ferric Citrate(0.01M)

** 추가조치 사항 : Dissolve ingredients (except thioglycolate) in the order given, adjust pH to 6.75 with NaOH and boil medium for 1 min. Dissolve and autoclave at 121°C for 15 min.

Liquid medium: Purge medium with N2 gas for 10 min and dispense under the same gas atmosphere in anoxic vials to 1/3 of their volume. Seal vials with screw caps and gas tight rubber closures. Autoclave at 121°C for 15 min. Before inoculation add thioglycolate from a 3% (w/v) solution, freshly prepared under N2 and filter-sterilized. Then add sterile air (with hypodermic syringe through the rubber closure) to 1% O2 concentration in the gas phase.

Semi solid medium: Purge medium with N2 gas for 10 min. and dispense under same gas atmosphere 10 ml of agar containing medium per 16 x 150 mm anoxic screw cap tube. After autoclaving, tubes may be stored at room temperature. Prior to inoculation add thioglycolate from a 3% (w/v) solution, freshly prepared under N2 and filter-sterilized. Then add sterile air (with hypodermic syringe through the rubber closure) to a concentration of 1% (v/v) in the vial and let equilibrate medium overnight in order to establish a redox gradient.
Prior to inoculation media should be slightly pink in color. Strongly reduced conditions will not support growth of the organism. Incubate tubes with semi-solid medium without agitation in an upright position. During growth O2 will be consumed, resazurin decolorized and the pH increase. Feed oxygen (by adding air) and succinic acid from sterile 0.05 M solution (to maintain pH below 7). If higher densities of magnetic cell are wanted, ferric quinate also has to be fed.

For KCTC 32146 increase the amount of added O2 to a concentration of 10% (v/v) in the headspace gas atmosphere.