A Mutation that Blocks Initiation of DNA Synthesis in Hamster Cells

1983 ◽  
pp. 265-275 ◽  
Author(s):  
Roger Hand ◽  
Eric Eilen ◽  
Claudio Basilico
Keyword(s):  
Dna Synthesis

Use of Antibody to aid Visualization of Protein at the Termini of Bacteriophage Ø29 DNA

1980 ◽  
Vol 38 ◽  
pp. 540-541
Author(s):  
Dwight Anderson ◽  
Charlene Peterson ◽  
Gursaran Notani ◽  
Bernard Reilly
Keyword(s):  
Electron Microscopy ◽  
Bacillus Subtilis ◽  
Dna Synthesis ◽  
Restriction Endonuclease ◽  
Protein Complex ◽  
Protein Product ◽  
Viral Dna ◽  
Small Proteins ◽  
Antibody Labeling ◽  
Subtilis Bacteriophage

The protein product of cistron 3 of Bacillus subtilis bacteriophage Ø29 is essential for viral DNA synthesis and is covalently bound to the 5’-termini of the Ø29 DNA. When the DNA-protein complex is cleaved with a restriction endonuclease, the protein is bound to the two terminal fragments. The 28,000 dalton protein can be visualized by electron microscopy as a small dot and often is seen only when two ends are in apposition as in multimers or in glutaraldehyde-fixed aggregates. We sought to improve the visibility of these small proteins by use of antibody labeling.

Classification of small type B/C follicles as primordial follicles in mature rats

Reproduction ◽  
2000 ◽  
pp. 43-48 ◽  
Author(s):  
S Meredith ◽  
G Dudenhoeffer ◽  
K Jackson
Keyword(s):  
Dna Synthesis ◽  
Granulosa Cells ◽  
Single Layer ◽  
Reliable Indicator ◽  
Type B ◽  
Primordial Follicles ◽  
Type C

In the present study, follicles were classified according to the morphology of their granulosa cells. Type B follicles contained only flattened granulosa cells; type B/C follicles had a mixture of flattened and cuboidal granulosa cells in a single layer, and type C follicles had a single layer of cuboidal granulosa cells. The primary objectives of the study were to determine whether 5-bromo-2-deoxyuridine incorporation into type B/C follicles was a marker for initiation of growth and how long type B/C follicles could remain at the same stage before transformation to type C follicles. Female Holtzman rats received bromo-deoxyuridine for 7 days. After the infusion (day minipumps were removed = day 0), rats were ovariectomized on days 0 (n = 9), 30 (n = 8), 90 (n = 8) and 150 (n = 9). The numbers of type B, B/C and C follicles within one ovary were determined using modified fractionator counting. Analysis over all times demonstrated that there were more (P < 0.0001) type B/C (941 +/- 61 per ovary) than type C (140 +/- 18 per ovary) or type B (159 +/- 19 per ovary) follicles. The numbers of type B and type C follicles did not differ from each other at any time. Only one of 34 rats evaluated had bromo-deoxyuridine-labelled type B follicles. On day 150, 57% of the bromo-deoxyuridine-labelled type B/C follicles remained from day 0. It is concluded that (1) DNA synthesis in granulosa cells of type B/C follicles is not a reliable indicator of impending growth; and (2) type B and type B/C follicles are both components of the pool of primordial follicles.

The inhibitory effects of 1.ALPHA., 25-dihydroxyvitamin D3 on DNA synthesis in cultured epidermal cells from patients with psoriasis vulgaris.

1988 ◽  
Vol 50 (4) ◽  
pp. 675-679 ◽  
Author(s):  
Seiji KONDO ◽  
Yoshiaki SATOH ◽  
Jun YAMAGUCHI ◽  
Junko ABE ◽  
Toshio KUROKI
Keyword(s):  
Dna Synthesis ◽  
Psoriasis Vulgaris ◽  
Epidermal Cells ◽  
Inhibitory Effects ◽  
Dihydroxyvitamin D3

355-OR: Effects of a Six-Week Intervention with Glucagon-Like Peptide-1 Analogue on Pancreatic Volume, Edema, and DNA Synthesis in Obese Men

Diabetes ◽  
2020 ◽  
Vol 69 (Supplement 1) ◽  
pp. 355-OR
Author(s):  
MARIA S. SVANE ◽  
HELLE H. JOHANNESEN ◽  
CHRISTOFFER MARTINUSSEN ◽  
KIRSTINE N. BOJSEN-MOLLER ◽  
MARTIN L. HANSEN ◽  
...  
Keyword(s):  
Dna Synthesis ◽  
Pancreatic Volume ◽  
Glucagon Like Peptide ◽  
Glucagon Like Peptide 1
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