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Tag: "base" at biology news

Big differences in duplicated DNA distinguish chimp and human genomes

...tal duplications that consist of as many as 20,000 base pairs. They found that most of the change to the o...large-scale genetic events have altered more total base pairs - about 2.7 percent of the genome - than differences from single base-pair changes, which acco...

Program finds lost genes in nematode genome

...ns and has an average intron length of about 4,000 base pairs, compared with an average intron length of a couple hundred base pairs in C. elegans. Brent and colleagues from the Dana-Farber Cancer Institute and Harvard Medical...

The making and breaking of microtubules

... of the nucleic acids DNA and RNA, consisting of a base (a letter in the genetic code) plus a sugar and three phosphate groups. But these molecules also regulate enzyme activity and play a crucial role in controlling microtubule growth. When GTP binds to a particular locus on beta tubulin (the E-site or ...

Census of Marine Life explorers surprised by diversity, density of Arctic creatures

...numerous animal in the southern sea. They form the base of the food web. As well, the team uncovered a sponge with a calcium-based skeleton, a finding that amazed scientists given the depth (about 4,500 meters) at which it was found. Research in the Southern Ocean is the most expensive in the world. The...

Breakthrough System for Understanding Ocean Plant Life Announced

...test their hypothesis that a uniquely modified DNA base called base J is a key component of the trypanosome's mechanism for evading the immune system. If the hypothesis...

Newly discovered protein an important tool for sleeping sickness research

...test their hypothesis that a uniquely modified DNA base called base J is a key component of the trypanosome's mechanism for evading the immune system. If the hypothesis...

Chemical Engineer Kao Explores Antibiotic Synthesis With DNA Chips

..., microarrays use both computer technology and DNA base pairing to track the expression of thousands of ge...sition of fluorescently labeled DNA molecules. The base pairs in the sample's single-stranded DNA, groups of which correspond to individual genes, stick to ...

Scientists analyze chromosomes 2 and 4

... longest known, protein-coding sequence ?a 280,000 base pair gene that codes for a muscle protein, called ... chromosome. They subsequently identified a 36,000 base pair stretch of DNA sequence that likely marks the precise location of the inactived centromere. Tha...

Doing a spin with DNA

... each other in the form of a double helix with the base pairs acting as the 'stairs' in a staircase. The sequence of these base pairs stores genetic information. During cell division genetic material is copied and the enzymes re...

Basis for DNA ejection from single phage particles

...ease occurred at a very high rate, reaching 75,000 base pairs of DNA/sec, but in a stepwise fashion. Pausing times were observed during ejection, and ejection was transiently arrested at definite positions of the genome in close proximity to genetically defined physical interruptions in the DNA. The autho...

NYU and MSKCC research provides model for understanding chemically induced cancer initiation

...one carbon and three hydrogen atoms) on a cytosine base adjacent to the damaged site. Without this methyl ...arcinogenic residue is sandwiched between adjacent base pairs in the double helix. "Such conformational differences in methylated and unmethylated DNA sequ...

Human Cells Filmed Instantly Messaging for First Time

... of the 2,263 million acres that comprise the land base of the U.S. has potential for growing biomass. About 33 percent of the land area is classified as forest, 26 percent as grassland, 20 percent as cropland, 13 percent as urban areas, swamps and deserts, and 8 percent as special uses such as public fac...

Growth in biomass could put US on road to energy independence

... of the 2,263 million acres that comprise the land base of the U.S. has potential for growing biomass. About 33 percent of the land area is classified as forest, 26 percent as grassland, 20 percent as cropland, 13 percent as urban areas, swamps and deserts, and 8 percent as special uses such as public fac...

Chemicals in tattoo inks need closer scrutiny

...rs selected their samples based on the most likely base colors. Because there have been no previous studies, they are using analytical techniques that can test for a wide variety of chemical components, rather than looking for a specific group of compounds. "At this point in the study, we have determine...

Microbial forensics: The next great forensic challenge

... assurance guidelines should be adapted to build a base of acceptance, credibility. and reliability for addressing this next grand forensic challenge." Murch will present the paper, "Biothreat agent forensics: Seeking attribution using an adaptive, integrated approach (ComSci 6)," at 11:30 a.m. Monday, M...

Increased risk of osteoporosis associated with gene that one in five people have

...ariants differ from one another by one or more DNA base pairs. "Previous studies showed that some CYP1A1 variants are linked to estrogen-related cancers, such as breast, ovarian or endometrial cancers," says Reina Armamento-Villareal, M.D., assistant professor of medicine in the Division of Bone and Mine...

Hirsute Or Hairless? Two Proteins May Spell The Difference

...n directs underlying mesenchymal cells to form the base of the hair follicle, called the dermal papilla, and both structures contribute to the mature hair follicle. During development, cells are constantly bombarded with external signals. The trick is figuring out which signals trigger the transcriptional...

Scientists discuss improved biopesticides for locust control in West Africa

...get organisms," Vaughan said. "The persistence of base biopesticides is low in the environment because of degradation from sunlight," Agblevor said. "We have developed coating technologies to improve on the environmental persistence of the biopesticide, specifically a lignin coating for the spores, which...

Bone Density Recovers After Teens Stop Injected Contraceptive

...rovide women with reliable information on which to base their contraceptive choices,?Dr. Kaufman said. “Depo-Provera is one of the most effective contraceptives ?its side effects need to be weighed against the potential consequences of an unintended pregnancy that could result from using a less effective ...

Kinovate Life Sciences Launches Nittophase?High Performance Solid Support For Oligonucleatide Synthesis

...he oligonucleotide industry. Solid support is the base structure used in the synthesis of oligonucleotides, including diagnostic probes and primers, antisense including RNAi, microRNA, DNA-based and aptamer drugs and represents a substantial portion of the cost to manufacture these oligonucleotides. Nit...

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