Search results for "Opus"

Jenis-Jenis Kima dan Kelimpahannya di Perairan Amdui Distrik Batanta Selatan Kabupaten Raja Ampat

2017

Kima merupakan salah satu jenis molusca laut yang banyak ditemukan di perairan Raja Ampat. Hewan ini dilindungi di seluruh dunia termasuk di Indonesia. Penelitian ini dilakukan pada bulan Maret-April 2014, di perairan Amdui yang memiliki ekosistem terumbu karang, dan ditetapkan 3 lokasi pengamatan yaitu: Pulau Ayem, Teluk Sawawris dan Teluk Sawros. Metode yang digunakan pada penelitian ini adalah metode observasi dengan teknik belt transek, dan bertujuan untuk mengetahui jenis dan kelimpahan kima di perairan Amdui. Kima yang ditemukan di perairan laut Kampung Amdui Kabupaten Raja Ampat yaitu 8 jenis terdiri dari T. crocea, T. maxima, T. squamosa, T .gigas, H. porcellanus, H. hippopus, T. te…

José Vidal-Beneyto, intellectuel espagnol

2010

Effects of forest regeneration on the structure of bird communities in northern Finland

1985

Breeding bird communities in five stages of secondary forest succession were studied in northeastern Finland in 1980–82. Three groups of communities were distinguished: open land, brush phase and forest communities, dominated by Motacilla alba and Oenanthe oenanthe, Phylloscopus trochilus and Anthus trivialis, Phylloscopus trochilus and Fringilla montifringilla, respectively. Pair density, number of species, biomass of adult birds and species diversity increased in the course of succession, none of these, however, monotonously. Average bird weight showed a decreasing trend although the variation was considerable. The degree of specialization in communities (measured by ratios derived from n…

Identification of Cysteine Residues in Human Cationic Amino Acid Transporter hCAT-2A That Are Targets for Inhibition by N-Ethylmaleimide

2013

In most cells, cationic amino acids such as l-arginine, l-lysine, and l-ornithine are transported by cationic (CAT) and y(+)L (y(+)LAT) amino acid transporters. In human erythrocytes, the cysteine-modifying agent N-ethylmaleimide (NEM) has been shown to inhibit system y(+) (most likely CAT-1), but not system y(+)L (Devés, R., Angelo, S., and Chávez, P. (1993) J. Physiol. 468, 753-766). We thus wondered if sensitivity to NEM distinguishes generally all CAT and y(+)LAT isoforms. Transport assays in Xenopus laevis oocytes established that indeed all human CATs (including the low affinity hCAT-2A), but neither y(+)LAT isoform, are inhibited by NEM. hCAT-2A inhibition was not due to reduced tran…

The Xenopus Oocyte as an Ectopic Expression System for the Selection of Protein Isoform-Specific Antibodies

1993

A panel of Xenopus oocytes, each injected with cRNA coding for one specific isoform of the rat brain RCK family of voltage gated potassium channel proteins, was employed to screen for isoform-specific monoclonal antibodies. Several days after injection, cryosections of embedded oocytes were produced and were employed in immunohistochemical analysis of antibody binding. Of the advantageous properties of the assay, it employs the native antigen, it can be applied to homooligomeric and heterooligomeric proteins, and cryosections of the same batch can be stored frozen for later tests. The method may be advantageous also for the selection of isoform-specific antibodies of other protein families.

Mutations in SLC20A2 link familial idiopathic basal ganglia calcification with phosphate homeostasis.

2012

Familial idiopathic basal ganglia calcification (IBGC) is a genetic condition with a wide spectrum of neuropsychiatric symptoms, including parkinsonism and dementia. Here, we identified mutations in SLC20A2, encoding the type III sodium-dependent phosphate transporter 2 (PiT2), in IBGC-affected families of varied ancestry, and we observed significantly impaired phosphate transport activity for all assayed PiT2 mutants in Xenopus laevis oocytes. Our results implicate altered phosphate homeostasis in the etiology of IBGC.

Identity of invasive clawed frogs (Xenopus) in Sicily based on mitochondrial DNA sequences

2010

The amphibian globin gene repertoire as revealed by the <i>Xenopus </i>genome

2006

The draft genome sequence of the Western clawed frog <i>Xenopus (Silurana) tropicalis</i> facilitates the identification, expression analysis and phylogenetic classification of the amphibian globin gene repertoire. Frog and mammalian neuroglobin display about 67% protein sequence identity, with the expected predominant expression in frog brain and eye. Frog and mammalian cytoglobins share about 69% of their amino acids, but the frog protein lacks the mammalian-type extension at the C-terminus. Like in mammals, <i>X. tropicalis</i> cytoglobin is expressed in many organs including neural tissue. Neuroglobin and cytoglobin genomic regions are syntenically conserved in a…

Galloway-Mowat syndrome: New insights from bioinformatics and expression during Xenopus embryogenesis.

2021

Abstract Galloway-Mowat syndrome (GAMOS) is a rare developmental disease. Patients suffer from congenital brain anomalies combined with renal abnormalities often resulting in an early-onset steroid-resistant nephrotic syndrome. The etiology of GAMOS has a heterogeneous genetic contribution. Mutations in more than 10 different genes have been reported in GAMOS patients. Among these are mutations in four genes encoding members of the human KEOPS ( k inase, e ndopeptidase and o ther p roteins of small s ize) complex, including OSGEP, TP53RK, TPRKB and LAGE3. Until now, these components have been functionally mainly investigated in bacteria, eukarya and archaea and in humans in the context of t…

Other astacin homologs

2013

Publisher Summary This chapter describes the activity, specificity and structural chemistry of astacin homologs. The astacins are members of the metzincin superfamily such as the serralysins, the reprolysins/adamalysins, the matrixins, the leishmanolysins, the pregnancy-associated plasma proteins, the snapalysins and the fragilysins. Proteins of the hatching subfamily have been shown to be important for the cleavage of membranes coating developing embryos of invertebrates and vertebrates. Other members of this subfamily have varying or even several functions. UVS.2 from Xenopus, originally shown to play a role in dorso-anterior development, has been identified as the frog hatching enzyme. T…