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MACHEREY-NAGEL – 08 / 2013, Rev. 01

16

6 Appendix

6.1 Troubleshooting

Problem

Possible cause and suggestions

Incomplete 

lysis of 

bacterial 

cells

Cell pellet not properly resuspended

• 

It is essential that the cell pellet is completely resuspended 

prior to lysis. No cell clumps should be visible before addition 

of Buffer A2. 

SDS in Buffer A2 precipitated

• 

Storage of Buffer A2 below 20 °C may cause precipitation of 

SDS. If salt precipitate is observed, incubate buffer at 30–40 °C 

for several minutes and mix well until all precipitate is redissolved 

completely. Cool down to room temperature before use.

Too many bacterial cells used

• 

See table 3 for maximum amount of cells.

Poor  

plasmid 

yield

Incomplete lysis of bacterial cells

•  See „Possible cause and suggestions“ above.

No or insufficient amounts of antibiotic used during cultivation
• 

Cells carrying the plasmid of interest may become overgrown 

by cells without plasmid (see table 2), when inadequate levels 

of the antibiotics are used. Add appropriate amounts of freshly 

prepared stock solutions to all media; both solid and liquid.

Bacterial culture too old

• 

Do not incubate cultures for more than 16 h (LB) or 12 h 

(rich media)  at  37 °C  under  shaking  to  avoid  starvation  and 

plasmid degradation.

Incomplete neutralization

• 

Mix thoroughly after addition of Buffer A3 until LyseControl has 

turned colorless without any traces of blue.

Plasmid DNA purification

Содержание NucleoSpin 740727.10

Страница 1: ...Plasmid DNA purification User manual NucleoSpin Plasmid EasyPure August 2013 Rev 01...

Страница 2: ...ww mn net com NucleoSpin Plasmid EasyPure 1 Cultivate and harvest bacterial cells 12 000 x g 30 s 2 Cell lysis 150 L Buffer A1 250 L Buffer A2 RT up to 2 min 350 L Buffer A3 3 Clarification of the lys...

Страница 3: ...ion 6 2 1 Basic principle 6 2 2 Kit specifications 6 2 3 Growth of bacterial cultures 7 2 4 Elution procedures 8 3 Storage conditions and preparation of working solutions 10 4 Safety instructions 11 4...

Страница 4: ...Buffer A2 5 mL 15 mL 75 mL Neutralization Buffer A3 5 mL 20 mL 100 mL Wash Buffer AQ Concentrate 6 mL 6 mL 30 mL Elution Buffer AE 15 mL 15 mL 30 mL Liquid RNase A 2 mg 6 mg 30 mg NucleoSpin Plasmid...

Страница 5: ...e detailed protocol sections of this user manual if the NucleoSpin Plasmid EasyPure kit is used for the first time Experienced users however may refer to the Protocol at a glance instead The Protocol...

Страница 6: ...g step with Buffer AQ Pure plasmid DNA is finally eluted under low ionic strength conditions with slightly alkaline Buffer AE 5 mM Tris HCl pH 8 5 2 2 Kit specifications The NucleoSpin Plasmid EasyPur...

Страница 7: ...roth or CircleGrow can be used In this case bacteria grow faster reach the stationary phase much earlier than in LB medium 12 h and higher cell masses can be reached However this does not necessarily...

Страница 8: ...Recommended culture volumes for NucleoSpin Plasmid EasyPure OD600 1 2 3 4 5 6 Culture volume 15 mL 8 mL 5 mL 4 mL 3 mL 2 mL Note if too much bacterial material is used the lysis and precipitation step...

Страница 9: ...ifuge Apply a second aliquot of elution buffer incubate and centrifuge again Thus about 85 100 of bound nucleic acids are eluted with the standard elution volume at a high concentration Elution Buffer...

Страница 10: ...he preparation Storage of Buffer A2 below 20 C may cause precipitation of SDS If salt precipitate is observed incubate buffer at 30 40 C for several minutes and mix well until all precipitate is redis...

Страница 11: ...skin Ber hrung mit der Haut vermeiden S 26 In case of contact with eyes rinse immediately with plenty of water and seek medical advice Bei Ber hrung mit den Augen gr ndlich mit Wasser absp len und Arz...

Страница 12: ...siv sein H 302 Harmful if swallowed Gesundheitssch dlich bei Verschlucken H 315 Causes skin irritation Verursacht Hautreizungen H 317 May cause an allergic skin reaction Kann allergische Hautreaktione...

Страница 13: ...n irritation or a rash occurs Get medical advice attention Bei Hautreizung oder ausschlag rztlichen Rat einholen rztliche Hilfe hinzuziehen P 337 313 Get medical advice attention Bei anhaltender Hautr...

Страница 14: ...A2 Attention Check Buffer A2 for precipitated SDS If a white precipitate is visible warm the buffer for several minutes at 30 40 C until precipitate is dissolved completely Cool buffer down to room t...

Страница 15: ...w through and make sure the spin cup outlet does not touch the wash buffer surface Otherwise repeat the centrifugation step Note To reduce ethanol carry over to a minimum for better performance in dow...

Страница 16: ...oo many bacterial cells used See table 3 for maximum amount of cells Poor plasmid yield Incomplete lysis of bacterial cells See Possible cause and suggestions above No or insufficient amounts of antib...

Страница 17: ...strains used Especially when working with nuclease rich strains keep plasmid preparations on ice or frozen in order to avoid DNA degradation Inappropriate storage of plasmid DNA Quantitate DNA directl...

Страница 18: ...through and repeat centrifugation Elution of plasmid DNA with TE buffer EDTA may inhibit sequencing reactions Repurify plasmid DNA and elute with Buffer AE or water Alternatively the eluted plasmid DN...

Страница 19: ...Buffer A3 740913 1 1 L Buffer AQ Concentrate for 100 mL Buffer AQ 740995 20 mL Buffer AE 740917 1 1 L Liquid RNase A 740397 250 mg Collection Tubes 2 mL 740600 1000 6 3 References Birnboim H C and J D...

Страница 20: ...PRODUCTS NOT LABELED AS IVD ARE NOT SUITED FOR ANY CLINICAL USE INCLUDING BUT NOT LIMITED TO DIAGNOSTIC THERAPEUTIC AND OR PROGNOSTIC USE No claim or representations is intended for its use to identi...

Страница 21: ...xpressed or implied The warranty provided herein and the data specifications and descriptions of this MACHEREY NAGEL product appearing in MACHEREY NAGEL published catalogues and product literature are...

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