Saccharomyces cerevisiae Meyen ex E.C. Hansen
204519 ™
204519 ™
ATCC determines the biosafety level of a material based on our risk assessment as guided by the current edition of Biosafety in Microbiological and Biomedical Laboratories (BMBL), U.S. Department of Health and Human Services. It is your responsibility to understand the hazards associated with the material per your organization’s policies and procedures as well as any other applicable regulations as enforced by your local or national agencies.
ATCC highly recommends that appropriate personal protective equipment is always used when handling vials. For cultures that require storage in liquid nitrogen, it is important to note that some vials may leak when submersed in liquid nitrogen and will slowly fill with liquid nitrogen. Upon thawing, the conversion of the liquid nitrogen back to its gas phase may result in the vial exploding or blowing off its cap with dangerous force creating flying debris. Unless necessary, ATCC recommends that these cultures be stored in the vapor phase of liquid nitrogen rather than submersed in liquid nitrogen.
1. To thaw a frozen ampoule, place in a 25°C to 30°C water bath, until just thawed (approximately 5 minutes). Immerse the ampoule just sufficient to cover the frozen material. Do not agitate the ampoule.
2. Immediately after thawing, wipe down ampoule with 70% ethanol and aseptically transfer at least 50 µl (or 2-3 agar cubes) of the content onto a plate or broth with medium recommended.
3. Incubate the inoculum/strain at the temperature and conditions recommended.
4. Inspect for growth of the inoculum/strain regularly. The sign of viability is noticeable typically after 1-2 days of incubation. However, the time necessary for significant growth will vary from strain to strain.
ade2 mutants turn red.
The basic procedure for inducing chromosome loss is: 1) incubate a cdc6/cdc6 multiply-heterozygous diploid (3000 cells/plate) on YEPD for 6 hours at 35C, 2) shift to 23°C, and 3) grow the survivors (about 300 cells) at 23°C for a few days.Replica plate the surviving colonies onto diagnostic media, paying particular attention to the very small colonies with long lag periods before growth at 23°C. Usually 10 YEPD plates will be adequate;
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however, because of differences in viabilities among strains, plates with different numbers of starting cells may be required.For a dominant unmapped marker, X, cross the mutant strain to cdc6 his4. Sporulate and dissect the diploid in order to place the marker into a cdc6 haploid background. Mate the cdc6 X strain to N439-. Loss of the chromosome carrying X should uncover a recessive mapped marker on the homolog.For a recessive unmapped marker, y-, cross the mutant to N439-. Sporulate and dissect the diploid. Pick up cdc6 y- haploids in a variety of multiply auxotrophic backgrounds or backcross to N439- to get the recessive marker in a strain marked on all chromosomes. Mate cdc6 y- to a cdc6 his4 haploid. Loss of the chromosome carrying Y should uncover other recessive markers on the homolog.
The product is provided 'AS IS' and the viability of ATCC® products is warranted for 30 days from the date of shipment, provided that the customer has stored and handled the product according to the information included on the product information sheet, website, and Certificate of Analysis. For living cultures, ATCC lists the media formulation and reagents that have been found to be effective for the product. While other unspecified media and reagents may also produce satisfactory results, a change in the ATCC and/or depositor-recommended protocols may affect the recovery, growth, and/or function of the product. If an alternative medium formulation or reagent is used, the ATCC warranty for viability is no longer valid. Except as expressly set forth herein, no other warranties of any kind are provided, express or implied, including, but not limited to, any implied warranties of merchantability, fitness for a particular purpose, manufacture according to cGMP standards, typicality, safety, accuracy, and/or noninfringement.
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