Mechanism of Kasugamycin Resistance in Escherichia coli

TL Helser, JE Davies, JE Dahlberg - Nature New Biology, 1972 - nature.com
Strains of Escherichia coli are resistant to the antibiotic kasugamycin due to the partial non-
methylation of 16S ribosomal RNA. An RNA methylase activity, absent from resistant strains …

Characterization of a 40S Ribosomal Subunit Complex in Polyribosomes of Saccharomyces cerevisiae Treated with Cycloheximide

TL Helser, RA Baan, AE Dahlberg - Molecular and cellular biology, 1981 - Taylor & Francis
Under specific conditions cycloheximide treatment of Saccharomyces cerevisiae caused the
accumulation of a type of polyribosome called “halfmer.” Limited ribonuclease digestion of …

Sequences Required for Transcriptional Initiation of the Saccharomyces cerevisiae CYC7 Gene

AM Healy, TL Helser, RS Zitomer - Molecular and cellular biology, 1987 - Taylor & Francis
A series of BAL 31 deletions were constructed in the upstream region of the Saccharomyces
cerevisiae CYC7 gene to determine sequences required for transcriptional initiation. These …

Safety wordsearch

TL Helser - Journal of Chemical Education, 1999 - ACS Publications
This puzzle embeds 17 words or phrases about laboratory safety in a 10 x 14-letter matrix.
When all are found, the 9 unused letters complete the sentence," Safety is...".

Elemental zoo

TL Helser - Journal of Chemical Education, 2003 - ACS Publications
This puzzle uses the symbols of 39 elements to spell the names of 25 animals found in zoos.
Underlined spaces and the names of the elements serve as clues. To solve the puzzle, …

A Lab Safety" Scavenger Hunt"

TL Helser - Journal of chemical education, 1999 - ACS Publications
An active "scavenger hunt" can effectively augment the obligatory lecture on lab safety that
students rarely heed or remember when it counts. Each team of students is given a diagram …

Enzyme activity: the ping-pong ball torture analogy

TL Helser - Journal of chemical education, 1992 - ACS Publications
The author uses this analogy to help students visualize and understand the effect of reaction
conditions on the initial rate of an enzyme-catalyzed reaction.

Small ribonucleic acid molecules produced during ribosome biosynthesis in Saccharomyces cerevisiae.

TL Helser, CS McLaughlin - Journal of Biological Chemistry, 1975 - Elsevier
A 5.8 S ribosomal RNA (rRNA) is found noncovalently bound to the 25 S RNA in the 60 S
subunit of yeast ribosomes. Both molecules appear to be derived from the 27 S RNA, a …

[PDF][PDF] Polyxanthylic and polyguanylic acid inhibition of murine leukemia virus activities

SK Arya, TL Helser, WA Carter, POP Ts'o - Molecular Pharmacology, 1976 - Citeseer
ARYA, SK, HELSER, TL, CARTER, WA & TS’o, P. 0. P.(1976) Polyxanthylic and polyguanylic
acid inhibition ofmunine leukemia virus activities. Mol. Pharmacot., 12, 844-853. Single-…

[CITATION][C] Change in Methylation of 16S Ribosomal RNA Associated with Mutation to Kasugamycin Resistance in Escherichia coli

TL HELSER, JE DAVIES, JE DAHLBERG - Nature New Biology, 1971 - nature.com
Kasugamycin Resistance in Page 1 12 NATURE NEW BIOLOGY VOL. 233 SEPTEMBER 1
1971 Change in Methylation of 16S Ribosomal RNA Associated with Mutation to Kasugamycin …