Single Supercoiled DNAs DNA Supercoiling in vivo In most organisms, DNA is negatively supercoiled (s ~ -0.06) Actively regulated by topoisomerases, ubiquitous and ...
Denaturation/Renaturation. Denaturation: separation of the 2 strands of the ... Toroid or. spiral. Example: DNA wraps around. histone protein core within nucleosomes; ...
Agarose = molecular sieve Retards long DNA more than short DNA. Linear DNA usually faster than circular: Circular DNA 2 forms: covalently closed circular (ccc ...
PROPERTIES OF DNA II. Supercoiling and Topoisomerases The E. coli chromosome 2 puzzles 1. It was circular and twisted 2. Chromatograph showed evenly spaced bands ...
Title: The Effects of Pollutants on puc-19 Plasmid DNA Author: cal-staff Last modified by: cal-staff Created Date: 2/28/2002 12:36:23 AM Document presentation format
Topological Problems in Replication Linear Chromosomes: Telomerase for replication of the ends Topoisomerases to relieve strain of untwisting and supercoiling
... Hybrid Strand Separation And CsCl centrifugation N15 ssDNA N14 ssDNA N15 ssDNA N15 dsDNA Looks like control ... growth rates? N14 N15 only ... Genetic Control of ...
MICROBIOLOGY MIMM 386 (Laboratory Course in Microbiology and Immunology) Dr. Benoit Cousineau. Department of Microbiology & Immunology. McGill University. Exercise 4 ...
Local unwinding during replication results in overwinding or supercoiling of ... Wasserman & Cozzarelli, Science 1986. Topoisomerases. Type I topoisomerases: ...
E. Unraveling the DNA at one position changes the superhelicity ... A. Gel electrophoresis. i. 1 dimensional. ii. 2 dimensional. B. Density sedimentation ...
... genes -lactamase can destroy penicillin and other -lactam antibiotics Kanamycin interferes with Ribosomes Plasmids can be cut with restriction enzymes ...
in vivo Dr. Sevim I k Type II mechanism Reactions catalysed by topoisomerases Prokaryotes: Reactions catalysed by topoisomerases Eukaryotes: Functions of ...
DNA structure/topology. Genomes are longer than the cells in which they are packaged ... Review of Watson/Crick DNA Structure. major groove. minor groove. 34 ...
B is the magnetic flux density of the applied field, measured in tesla ... C is the Curie constant. http://www.selectscience.net/SSUserPhotos.aspx?imgID=7 ...
2. No promoter unwinding is observed in the absence of the initiation factor s; ... 4. Unwinding is abolished by prior addition of heparin (binds free RNAP) ...
at 3 5 pm in 109 SKH. December 16 (Thursday) at 3 5 pm: ... Ocular micrometer present. 110 mm. 10 mm to 0.2 mm. Working distance. 9 - 40. 25 - 1000 ...
Bond vibrations 1 fs (10-15 s) Sugar repuckering 1 ps (10-12 s) DNA bending 1 ... DNA: global and local 3'3' stretching. TBP induced deformation. X-ray Model ...
CHAPTER 12 The Cell Nucleus and the Control of Gene Expression The Nucleus of a Eukaryotic Cell (14) Heterochromatin has many methylated H3 histones, which stabilize ...
Stabilizes topoisomerase I-DNA intermediate, preventing DNA strand re-ligation ... There are enzymes that will cut DNA, ligate DNA, and change the topology of DNA. ...
CHAPTER 10 The Nature of the Gene and the Genome Sequencing Genomes: The Footprints of Biological Evolution (5) Structural Variation Segments of the genome can change ...
The diffraction pattern from the DNA optical transform shows the central ... (A and G) bases to the ribose ring are broken ], can be generated by formic acid ...
DNA isolated from different tissues of the same species have the same base composition. ... The two strands of DNA are stabilized by the base interactions. ...
However, pol III in a multi-protein aggregate termed the ... on lagging strand must bind and dissociate constantly, yet keep at same pace as leading strand ...
( a) Ball and stick drawing and corresponding space-filling model viewed ... ( b) Ball and stick drawing and corresponding space-filling model viewed down the ...
Nucleic acid chemistry part 1 : Some aspects of chemical and enzymatical modification of nucleic acids * * * * * * * * Reaction of guanosine with glyoxal (r = ribose ...
Wind or unwind. Rejoin ends. There is both positive and negative. supercoiling. ... provides energy for local unwinding.. Local unwinding is necessary for ...
DNA replication introduction 'The perfect experiment' More DNA replication: topology, requirements for ... Tuesday: finish DNA replication and methods day ...
Enzymes for manipulating DNA *** Buffers and solution conditions*** I. DNA polymerases III. Kinase and alkaline phosphatase IV. Nucleases V. Topoisomerase
The Organic Chemistry of Drug Design and Drug Action Chapter 6 DNA-Interactive Agents DNA-Interactive Agents Cancer Cells Structure-Based Design of Potential Drugs ...
Goal: to get p-ARA-R Plasmid, (which is a ligated plasmid containing the DNA ... tube will be cut using restriction enzymes (Hind III and BamH I), the p-ARA-R is ...
Beth A. Montelone, Ph. D., Division of Biology, Kansas State University ... in a mechanistically continuous fashion, a disparity that has never been ...
Molecular Profiling of Breast Cancer: Predictive Markers of Long Term Survival ... Some breast cancers with the same histological type, tumour subtype and similar ...
Departamento de Agroqu mica y Bioqu mica Departament D Agroqu mica i Bioqu mica Genetic information (DNA) mRNA proteins. Transmission of genetic information ...
Sample combs, around which molten agarose is poured to form sample wells in the gel. ... Pour the warm solution into a mold which fitted with a well - forming comb. ...
Heterochromatin lacks genes or they are inactive Much heterochromatin is found in certain structural parts of the chromosomes: centromeres and telomeres.
Dedicated to the structure of DNA and the processes that propagate (??) ... are displaced by base-base interactions, which creates disorder/hydrophobicity ...