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Applied and Environmental Microbiology, May 1999, p. 2267-2268, Vol. 65, No. 5
Institute of Microbial Technology, Sector
39A, Chandigarh 160 036, India
Received 26 May 1998/Accepted 21 January 1999
Yeast strains disrupted for ATH1, which encodes
vacuolar acid trehalase, have been reported to grow to higher cell
densities than reference strains. We showed that the increase in cell
density is due to the URA3 gene introduced as a part of the
disruption and concluded that the misinterpretation is a result of not
using a control strain with matching auxotrophic markers.
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Elevated Growth of Saccharomyces cerevisiae ATH1 Null
Mutants on Glucose Is an Artifact of Nonmatching Auxotrophies of
Mutant and Reference Strains
*
Corresponding author. Mailing address: Institute of
Microbial Technology, Sector 39A, Chandigarh 160 036, India. Phone:
0091-172-695215, -695216, or -695219, ext. 442. Fax:
0091-172-690585 or -690632. E-mail: ganesank{at}usa.net.
Communication no. 007/98 of the Institute of Microbial Technology,
Chandigarh, India.
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