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CreatorTitleDescriptionSubjectDate
476 Olivera, Baldomero M.; Yoshikami, Doju; Bulaj, GrzegorzPost-translational amino acid isomerization: a functionally important D-amino acid in an excitatory peptideThe post-translational modification of an L- to a D-amino acid has been documented in relatively few gene products, mostly in small peptides under 10 amino acids in length. In this report, we demonstrate that a 46-amino acid polypeptide toxin has one D-phenylalanine at position 44, and that the ...D-amino acid; Excitatory peptides; Conotoxins2005
477 Ehleringer, James R.Potential adaptability and constraints of response to changing climates for Encelia farinosa var. phenicodonta from southern Baja California, MexicoTo examine the physiological adaptability of Encelia farinosa var. phenicodonta from southern Baja California, plants from Todos Santos, BCS were raised in central Arizona where winter-spring precipitation is greater than typically experienced by this variety. Plants were capable of high photosynthe...Encelia farinosa var. phenicodonta; Ecophysiology1996
478 Olivera, Baldomero M.Preliminary study of Conus venom proteinALTHOUGH THE TOXICITY of venoms of the genus Conus has been known since a report by RUMPHIUS in 1705 (VAN BENTHEM-JUTTINO, 1959), these venoms have been studied only intermittently since. Biochemical studies have not been carried out to any great extent; the last major study on the biochemistry of...Conotoxins; Conus venom1976
479 Davidson, Diane W.Preliminary study of seed predation in desert and montane habitatsMultifactorial experiments in which domestic seeds in shallow glass containers were distributed in desert and montane habitats provided data on identity of seed predators (whether rodents or ants), spatial and temporal pattern of their foraging activities, and their preferences for sizes and species...Ant; Competition; Granivory; Predators, Seed; Rodent; Seed selection1975
480 Gesteland, Raymond F.; Atkins, John F.; Felden, Brice; McCutcheon, John P.Probing the structure of the Escherichia coli 10Sa RNA (tmRNA)The conformation of the Escherichia coli 10Sa RNA (tmRNA) in solution was investigated using chemical and enzymatic probes. Single- and double-stranded domains were identified by hydrolysis of tmRNA in imidazole buffer and by lead(II)-induced cleavages. Ribonucleases T1 and S1 were used to map unpai...Covariation; Pseudoknot; Structural Probing; 10Sa RNA; tmRNA1997
481 Gesteland, Raymond F.Processing of adenovirus 2-induced proteinsAnalysis of (35)S-methionine-labeled extracts of adenovirus 2-infected KB cells revealed 22 virus-induced polypeptide components. Most proteins of the virion were easily detected in extracts of whole cells labeled for short periods between 15 and 30 h after infection; however, several virion compone...Adenoviridae; Viral Proteins; Protein Precursors; Methionine; Mouth Neoplasms1973
482 Capecchi, Mario R.Production of selenoprotein P (Sepp1) by hepatocytes is central to selenium homeostasisBackground: Sepp1 transports selenium, but its complete role in selenium homeostasis is not known. Results: Deletion of Sepp1 in hepatocytes increases liver selenium at the expense of other tissues and decreases whole-bodyselenium by increasing excretion. Conclusion: Sepp1 production by hepatocytes ...2012-01-01
483 Sekercioglu, CaganPromoting community-based bird monitoring in the tropics: conservation, research, environmental education, capacity-building, and local incomesLong-term, locally-based biodiversity monitoring programs are essential for understanding and mitigating the effects of global change on tropical biodiversity while providing capacity-building, environmental education, and public outreach. However, these programs are lacking in most tropical countri...2011-01-01
484 Goller, FranzProsthetic Avian vocal organ controlled by a freely behaving bird based on a low dimensional model of the biomechanical peripheryBecause of the parallels found with human language production and acquisition, birdsong is an ideal animal model to study general mechanisms underlying complex, learned motor behavior. The rich and diverse vocalizations of songbirds emerge as a result of the interaction between a pattern generator i...2012-01-01
485 Jorgensen, ErikProtein localization in electron micrographs using fluorescence nanoscopyA complete portrait of a cell requires a detailed description of its molecular topography: proteins must be linked to particular organelles. Immuno-electron microscopy can reveal locations of proteins with nanometer resolution but is limited by the quality of fixation, the paucity of antibodies, and...2010-01-01
486 Gussin, Gary N.; Capecchi, Mario R.Protein synthesis directed by DNA phage messengers.Even through the amino acids corresponding to most of the 64 nucleotide triplets are now known, several important aspects of the genetic code are not yet fully understood. In particular we need more knowledge about the "punctuation marks" of the code-for example, the signals necessary for the initia...Carbon Isotopes; Escherichia coli; Genetic Code; Methionine1967-09-01
487 Farmer, Colleen G.The provenance of alveolar and parabronchial lungs: insights from paleoecology and the discovery of cardiogenic, unidirectional airflow in the American alligator (Alligator mississippiensis)Birds and mammals evolved greater aerobic abilities than their common ancestor had. This required expansion of the cardiopulmonary system's capacity for gas exchange, but while directional selection for his expanded capacity resulted in extremely similar avian and mammalian hearts, strikingly differ...2010-07
488 Davidson, Diane W.Pruning of host plant neighbors by ants: an experimental approachSome ants of myrmecophytic plants either obligately or facultatively prune vegetation surrounding their host trees. Pruning behavior occurs at higher frequency in ants with sting defenses than in those with chemical defenses, which may generally convey an advantage in aggressive encounters between a...Allelopathy; Allomerus demararae; Ant-plant interactions; Ants; Cordia nodosa; Crematogaster; Mutualism; Peru; Plant-animal interaction; Pseudomyrmex; Triplaris americana1988
489 Farmer, Colleen G.The pulmonary anatomy of alligator mississippiensis and its similarity to the avian respiratory systemUsing gross dissections and computed tomography we studied the lungs of juvenile American alligators (Alligator mississippiensis). Our findings indicate that both the external and internal morphology of the lungs is strikingly similar to the embryonic avian respiratory system (lungs + air sacs). We...2012
490 Beckerle, Mary C.Purification and characterization of an α-actinin-binding PDZ-LIM protein that is up-regulated during muscle differentiationα-Actinin is required for the organization and function of the contractile machinery of muscle. In order to understand more precisely the molecular mechanisms by which α-actinin might contribute to the formation and maintenance of the contractile apparatus within muscle cells, we performed a scree...LIM domains; Z-disc; Actin; Actinin-associated LIM proteins; PDZ-LIM protein1999
491 Capecchi, Mario R.Purification and characterization of mouse hypoxanthine-guanine phosphoribosyltransferase.Hypoxanthine-guanine phosphoribosyltransferase (HGPR transferase) (EC 2.4.2.8) has been purified approximately 4500-fold to apparent homogeneity from mouse liver. The procedure involves the use of affinity chromatography and was designed to be readily adaptable to small scale isolations. The enzyme ...Buffers; Centrifugation, Density Gradient; Chromatography, Affinity; Chromatography, Gel; Chromatography, Ion Exchange; Electrophoresis, Polyacrylamide Gel1975-01-31
492 Beckerle, Mary C.Purification and characterization of zyxin, an 82,000-Dalton component of adherens junctionsWe describe here the purification and characterization of a recently identified adherens junction protein that has an apparent molecular mass of 82 kDa on sodium dodecyl sulfate-polyacrylamide gels (Beckerle, M. C. (1986) J. Cell Biol. 103, 1679-1687). The 82-kDa protein was isolated from avian smoo...Zyxin1992
493 Olivera, Baldomero M.; Hillyard, David R.Pyridine nucleotide cycle: studies in Escherichia coli and the human cell line D98/AH2Different metabolic steps comprise the pyridine nucleotide cycles in Escherichia coli and in the human cell line HeLa D98/AH2. An analysis of the "P-labeling patterns in vivo reveals that in E. coli, pyrophosphate bond cleavage of intracellular NAD predominates, while in the human cell line, cleava...Nicotinic acid; Turnover cycle; DNA ligation; Nicotinamide1981
494 Olivera, Baldomero M.Pyridine nucleotide metabolism in Escherichia coli. I. Exponential growthThe pyridine nucleotide pool of Escherichia coli is made up almost exclusively of DPN and TPN. In an exponentially growing glucose culture an average cell contains 1,460,000 molecules of DPN (30% reduced) and 440,000 molecules of TPN (57% reduced). If the total volume of the cell were accessible t...Nicotinic acid1971
495 Olivera, Baldomero M.Pyridine nucleotide metabolism in Escherichia coli. II. Niacin starvationThe effect of niacin starvation has been studied in a niacin-requiring auxotroph of Escherichia coli. If a culture is totally deprived of niacin, cells continue to divide until the total pyridine nucleotide content has fallen from 1.9 X 10^6 to 1.2 X 10^5 molecules per cell. During starvation, the r...Starvation; Nicotinic acid1973
496 Olivera, Baldomero M.Pyridine nucleotide metabolism in Escherichia coli. III. Biosynthesis from alternative precursors in vivoIn Escherichia coli, the nicotinamide moiety of pyridine nucleotides may be derived from de novo synthesis of the pyridine ring or through the uptake of either nicotinic acid or nicotinamide. De novo synthesis is the least preferred pathway; it is suppressed if an exogenous source is available. Nic...Nicotinic acid; Biosynthesis1973
497 Olivera, Baldomero M.Pyridine nucleotide metabolism in Escherichia coli. IV. TurnoverThere are two pyridine nucleotide turnover pathways in Escherichia coli, the Gholson turnover cycle, with nicotinamide as an intermediate, and a second new pathway which does not involve nicotinamide. In exponentially growing cultures with a generation time of 60 min, the rates of these cycles are ...Turnover cycle; Adenine1973
498 Dale, Colin; Babst, MarkusQuorum sensing primes the oxidative stress response in the insect endosymbiont, Sodalis glossinidiusSodalis glossinidius, a maternally transmitted bacterial endosymbiont of tsetse flies (Glossina spp.), uses an acylated homoserine lactone (AHL)-based quorum sensing system to modulate gene expression in accordance with bacterial cell density. The S. glossinidius quorum sensing system relies on the...Endosymbionts; Sodalis glossinidius; Quorum sensing; Oxidative stress response2008
499 Coley, Phyllis D.Rates of herbivory on different tropical treesRates of herbivory on marked young and mature leaves from saplings of 21 canopy tree species were measured in the wet and dry seasons. Species were classified into two life history groups: persistent species which are found throughout the shaded understory, and pioneer species which only become e...Herbivory; Grazing damage; Tropical trees; Pioneer species; Trees -- Tropics1982
500 Adler, Frederick R.Recent rapid increases in the right whale (Eubalaena australis) population off southern BrazilRight whales (Eubalaena australis) that gather on a wintering ground off southern Brazil have been aerial surveyed and photographically identified since 1987. As of 2003 the Brazilian Right Whale Catalogue has 315 different individual whales of which 31 were resighted in other years (23 females, 3 y...2005
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