Tag: "acids" at biology news

Bacterial Toxin Surprises Scientists

...from a harmless cluster of about 175 amino acids into a lethal structure that harpoons the ...ires a long stretch of water-soluble amino acids to cross a membrane made up of water-repelling lipids. "This result is so counteri...

New 'Twist' In Proteins Offers Possible Route To Improved Antibiotics

...ments in which theyselectively alter various amino acids in the enzyme and then study the effectsof those alterations, to understand how the natural enzyme works. Roderickis currently attempting to locate the active site by determining the X-raystructure of the enzyme with one of its bound substrates. ...

Photosystem I -- An Intermediate Step -- May Not Be Necessary For Plants

...roduce carbohydrates, lipids, proteins and nucleic acids -- the fundamental components of life. But Owens and researchers from the Oak Ridge National Laboratory in Tennessee found that in some cases photosynthesis can occur in the absence of PSI, they report in the journal Science (July 19, 1996). The rep...

Low-Protein Diet May Reverse Kidney Disease

...etoacid supplements for 10 months. Essential amino acids are those amino acids -- building blocks of protein -- that the body can not make. Ketoacids are slightly modified forms o...

Discovery Could Help Understand Breast-Cancer Therapies

...e University of Illinoishave identified four amino acids viewed as leading actors in the bindingof estrogen...ve shown that if one alters one of thesefour amino acids then one eliminates the ability of estrogen to bind, andas a consequence one also eliminates the abi...

Green Glow: Not Only For Halloween

...le: a barrel-shaped structure with a coil of amino acids corked in the center," explains Kamal Shukla, program director in NSF's division of molecular and cellular biosciences, which funded the research. "The green color results from the collapse of one turn of the coil to form a ring of three amino acids...

Fast Measurement Technique Reveals Early Steps In Protein Folding

...s from an ultraviolet lasercause some of the amino acids to fluoresce, revealing to the researchersa time-s...scence decays over time, we can tell how the amino acids arecoming together and how different parts of the protein are moving around." Based on recent measu...

Eating After Exertion May Be A Key To Speeding Body's Recovery

... time to eat. A post-exercisemeal containing amino acids and carbohydrates may speed your body's recoveryan...and low glycogen levels. A follow-up meal of amino acids (froma high-protein liquid) and carbohydrates (a sugar solution) allowed therats to recover to norma...

Corn Byproduct Shows Promise As Biodegradable Packaging Material

...l. Theprocess involves melting the zein with fatty acids to produce moldable resins.When disposed of, the p...c-like sheets by mixingit with palmitic or stearic acids at varying weight ratios. While the structureof the sheets changed according to the ratios, the shee...

Method Eases Making Amino Acids Critical In Medicinal Chemistry

...ntiomers) of alpha-, beta- and gamma- (aryl) amino acids is the latestapplication of a new chemical methodo...The importance of both natural and unnatural amino acids to medicinaland biological chemistry has made these compounds a focal point for chemicalsynthesis," ...

Progress In Prion Research: Three-Dimensional Structure Of Prion Protein Fully Uncovered

...crapie or BSE a large part of this "tail" of amino acids is notmobile but part of the rigid molecule structure. According to Wuethrich andGlockshuber, these "results indicate that the conversion of the normal to thedisease-inducing form of the prion protein may occur much more easily than hasbeen assumed s...

Researchers Discover First Animal Strain Of Hepatitis E Virus

...nt alike," explains Dr. Meng. Amino acids are the molecules from which proteins are made. "Among most human strains of hepatitis <font color="#FF0000" size="3" face="Arial"> <font size="3" face="Arial">E virus, amino acid ...

MGH-Led Team Finds Gene For Crippling Neurologic Disorder

...genetic code that spells out the sequence of amino acids in a protein. In other genetic diseases different mutations in the same gene are usually found in different families. "This situation, with only one mutation being associated with disease, isunique," Ozelius says. "It suggests that this specific ...

Wonder Thread: UD Scientists Report First Protein With Collagen And Elastin-Like Domains

...ined high levels of glycine and alanine--the amino acids most prevalent in two forms of protein in spider silk, Waite says. Although the structural similarity between preCol-P and spider silk still must be verified, Waite says the possibility should interest biochemists. "Spider silk is so thin, it has bee...

New Description Of Protein May Be Basis For Regulating Cholesterol

...ggest that pentalenene synthase uses certain amino acids in an internalvessel-like cavity to fold, shape and transform a natural building block - acommon plant alcohol derivative - into a particular product. In this case, theproduct is a terpene molecule that is eventually converted into anantibiotic. The...

NIH Office Of Dietary Supplements Expands Research Support

...tudy will help clarify the role of these key amino acids in inhibition and stimulation of glutathione synthesis in the intestinal tract. Glutathione is a substance that may have a protective effect against dietary and bacterial toxins found in infants whose intestinal function may be impaired by disease. ...

Competitive Inhibition May Enhance Safety Of Minimally Processed Fruits And Vegetables

...ng part in metabolism], including lactic andacetic acids which increase acidity in foods, inhibiting the growth of othermicroorganisms. "In the event of prolonged storage or temperature abuse of MPR foods, thebiocontrol culture (LAB) should grow, and prevent the growth of pathogenicmicroorganisms by comp...

New "Wonder Peanut" Beats Olive Oil In Healthful Benefits

...ed with about 50 percent in regular peanuts. Fatty acids are a major component in all oils, but it is the o...uts as the primary source of monounsaturated fatty acids as part of a low-fat diet may be more advantageous than use of typical vegetable oils. The SunOleic ...

Purdue Research Shows Omega-3S Benefit Bone

...ast research showed that eating more omega-3 fatty acids could decrease coronary heart disease risk and mig...chaired a session of the conference. Omega-3 fatty acids are one of two major types of polyunsaturated fatty acids in our diet, according to the Food and Dru...

Triglyceride Blood Levels Predict Heart Attack

...erides are compounds in the blood made up of fatty acids andglycerol that bind to proteins and form low-density lipoprotein (LDL) andvery-low-density lipoprotein (VLDL). LDL and VLDL contain large amounts ofcholesterol and triglycerides that can adhere to the arteries in the form offatty plaque. HDL is t...

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