Barrick Lab :: ProtocolsAntibioticStockSolutions

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---+ Media Amendment Stock Solutions

%TABLE{headeralign="left,center,center,center,center,left" dataalign="left,center,center,center,center,left,center,left"}%
| *Reagent* | *Abb* | *Stock Conc.* | *Working Conc.* | *Dilution* | *Solvent* | *MSDS* | *Notes* | 
| Ampicillin | Amp | 100 mg/mL | 100 µg/mL | 1,000&times; | ddH<sub>2</sub>O | [[http://www.sigmaaldrich.com/MSDS/MSDS/DisplayMSDSPage.do?country=US&language=en&productNumber=A9518&brand=SIAL&PageToGoToURL=http%3A%2F%2Fwww.sigmaaldrich.com%2Fcatalog%2Fproduct%2Fsial%2Fa9518%3Flang%3Den][ link]] |
| 3-Azido-2,3-dideoxythymidine | AZT | 10 mg/mL | 200 µg/mL | 50&times; | ddH<sub>2</sub>O | [[http://www.sigmaaldrich.com/MSDS/MSDS/DisplayMSDSPage.do?country=US&language=en&productNumber=11546&brand=FLUKA&PageToGoToURL=http%3A%2F%2Fwww.sigmaaldrich.com%2Fcatalog%2Fproduct%2Ffluka%2F11546%3Flang%3Den][link]] | Can substitute pharma grade zidovudine. Soluble up to 20 mg/mL in ddH<sub>2</sub>O  |
| Bromo-chloro-indolyl-galactopyranoside | X-gal | 40 mg/mL | 80 µg/mL | 500&times; | Dimethylformamide (DMF) | [[http://www.sigmaaldrich.com/MSDS/MSDS/DisplayMSDSPage.do?country=US&language=en&productNumber=B4252&brand=SIAL&PageToGoToURL=http%3A%2F%2Fwww.sigmaaldrich.com%2Fcatalog%2Fproduct%2Fsial%2Fb4252%3Flang%3Den][link]] | X-gal is a histochemical substrate for &#946;-galactosidase,<br> which cleaves X-Gal to yield an insoluble blue precipitate.|
| Carbenicillin | Crb | 100 mg/mL | 100 µg/mL | 1,000&times; | 50% EtOH | [[http://www.sigmaaldrich.com/MSDS/MSDS/DisplayMSDSPage.do?country=US&language=en&productNumber=C1389&brand=SIAL&PageToGoToURL=http%3A%2F%2Fwww.sigmaaldrich.com%2Fcatalog%2Fproduct%2Fsial%2Fc1389%3Flang%3Den][link]] | |
| Chloramphenicol | Cam | 20 mg/mL | 20 µg/mL | 1,000&times; | EtOH | [[http://www.sigmaaldrich.com/MSDS/MSDS/DisplayMSDSPage.do?country=US&language=en&productNumber=C0378&brand=SIGMA&PageToGoToURL=http%3A%2F%2Fwww.sigmaaldrich.com%2Fcatalog%2Fproduct%2Fsigma%2Fc0378%3Flang%3Den][link]] | |
| Cycloheximide | Chx | 100 mg/mL | 100 µg/mL | 1,000&times; | 100% DMSO | [[http://www.sciencelab.com/msds.php?msdsId=9923627][link]] | Anti-fungal, toxic to humans, use PPE! | 
| D-cycloserine| Dcs| 4 mg/mL | 4 µg/mL | 1,000&times; | ddH<sub>2</sub>O | [[http://www.sigmaaldrich.com/MSDS/MSDS/DisplayMSDSPage.do?country=US&language=en&productNumber=30020&brand=SIGMA&PageToGoToURL=http%3A%2F%2Fwww.sigmaaldrich.com%2Fcatalog%2Fproduct%2Fsigma%2F30020%3Flang%3Den][link]] | Degrades noticeably over the course of 1 week at 4°C |
| Gentamicin | Gen | 5 mg/mL | 5 µg/mL | 1,000&times; | ddH<sub>2</sub>O | [[http://www.sciencelab.com/msds.php?msdsId=9927175][link]] | For non-canonical experiments, use 20µg/mL in culture from 20mg/mL 1000&times; stock | 
|Isopropyl &#946;-<small>D</small>-1-thiogalactopyranoside  | IPTG | 0.1M | 0.1mM | 1000&times; | ddH<sub>2</sub>O | [[http://www.sciencelab.com/msds.php?msdsId=9924418][link]] | Light sensitive, MW: 238.31 g/mol |
| Kanamycin | Kan | 50 mg/mL | 50 µg/mL | 1,000&times; |  ddH<sub>2</sub>O | [[http://www.sciencelab.com/msds.php?msdsId=9927199][link]] | Plates lose sensitivity after 2 weeks| 
| Nalidixic Acid | Nal | 30 mg/mL | 30 µg/mL | 1,000&times; |  1M NaOH | [[http://www.sciencelab.com/msds.php?msdsId=9926169][link]] | |
| Novobiocin | Nov | 200 mg/mL | 200 µg/mL | 1,000&times; | ddH<sub>2</sub>O | [[http://www.sigmaaldrich.com/MSDS/MSDS/DisplayMSDSPage.do?country=US&language=en&productNumber=N1628&brand=SIGMA&PageToGoToURL=http%3A%2F%2Fwww.sigmaaldrich.com%2Fcatalog%2Fproduct%2Fsigma%2Fn1628%3Flang%3Den][link]] | |
| Rifampicin | Rif | 50 mg/mL | 100 µg/mL | 500&times; | MeOH + drops of 10M NaOH |  [[http://www.sigmaaldrich.com/MSDS/MSDS/DisplayMSDSPage.do?country=US&language=en&productNumber=R3501&brand=SIGMA&PageToGoToURL=http%3A%2F%2Fwww.sigmaaldrich.com%2Fcatalog%2Fproduct%2Fsigma%2Fr3501%3Flang%3Den][link]] |  Toxic to humans, use PPE! |
| Spectinomycin | Spec | 60 mg/mL | 60 µg/mL | 1,000&times; | ddH<sub>2</sub>O | [[http://www.sigmaaldrich.com/MSDS/MSDS/DisplayMSDSPage.do?country=US&language=en&productNumber=S4014&brand=SIGMA&PageToGoToURL=http%3A%2F%2Fwww.sigmaaldrich.com%2Fcatalog%2Fproduct%2Fsigma%2Fs4014%3Flang%3Den][link]] | |
| Streptomycin | Str | 100 mg/mL | 100 µg/mL | 1,000&times; | ddH<sub>2</sub>O | [[http://www.sciencelab.com/msds.php?msdsId=9927414][link]] | |
| Tetracycline | Tet | 10 mg/mL | 10 µg/mL | 1,000&times; |  70% EtOH | [[http://www.sciencelab.com/msds.php?msdsId=9925200][link]] | Light sensitive, stability < 2 weeks | 
| Zeocin | Zeo | 10 mg/mL | 10 µg/mL | 1,000&times; | ddH<sub>2</sub>O |[[http://www.invivogen.com/MSDS/Zeocin_solution_SDS.pdf][link]] | Some labs report using a higher concentration for selection.  <br>10 µg/mL is specifically used for growth of amberless strain A37 |
Working concentrations are for liquid or solid media.

---++ Preparation

Generally, prepare 30-50 mL of solution in a 50 mL conical tube. Then, filter sterilize solutions by pushing them through a 50 mL syringe fitted with a 0.22 µm filter made of a material appropriate for the solvent. Aliquot into 1.5 mL portions in 1.7 mL tubes using the repeat pipettor. Label with a permanent marker (one that won't wash off with ethanol). Store at -20°C in the dark. <br>

---++ Other considerations

   * Rifampicin is TOXIC to humans, light-sensitive, and degrades in solution rather quickly. It needs to be stored wrapped in foil and replaced every 2 months.<br>
   * Ampicillin degrades quickly in both plates and stock solutions.  Culture plates with Amp can be stored at 4°C for about 2 weeks.  Stock solutions can be stored at 4°C for 2 weeks but can last as long as 4-6 months when stored at -20°C. In general, use carbenicillin for ampicillin selection, because it is more chemically stable.<br>
   * D-cycloserine is best used within two days of pouring. A single small-scale experiment found 6-10x as many _E. coli_ colonies on 8-day old MG-Dcs plates that had spent 3 of those days at -20°C and 5 at 4°C, compared to what was found on 1 day old MG-Dcs.
   * Kanamycin plates only last a few weeks at 4°C; best to make fresh Kan plates every 2 weeks. <br>
Attachments
Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
docx	Making_stock_antibiotics_and_other_reagents.docx	r3 r2 r1	manage	89.7 K	2014-04-16 - 18:28	CraigBarnhart	How to make stock antibiotic solutions
This topic: Lab > WebHome > ProtocolList > ProtocolsGeneGorgingMarker > ProtocolsAntibioticStockSolutions
Topic revision: r36 - 2015-10-01 - JordanMonk