Vitellin
Mostrando 1-10 de 10 artigos, teses e dissertações.
-
1. Localization and function of Rhipicephalus (Boophilus) microplus vitellin-degrading cysteine endopeptidase
The tick Rhipicephalus (Boophilus) microplus is an important parasite of cattle in many areas of the tropics. Characterization of molecules involved in mechanisms such as vitellogenesis and embryo development may contribute to a better understanding of this parasite’s physiology. The vitellin-degrading cysteine endopeptidase (VTDCE) is the most active enzy
Publicado em: 2011
-
2. A Boophilus microplus vitellin-degrading cysteine endopeptidase
Here we describe the purification and characterization of a vitellin (VT) degrading cysteine endopeptidase (VTDCE) from eggs of the hard tick Boophilus microplus. A homogeneous enzyme preparation was obtained by chromatographic fractionation on ion-exchange and gel filtration columns and an autolysis step. This step consisted of incubation of a semipurified
Publicado em: 2011
-
3. Endocrinologia e controle da vitelogênese em carrapatos = Endocrinology and control of tick vitellogenesis / Endocrinology and control of tick vitellogenesis
Background: Ticks are distributed worldwide, with impacts on human and animal health. The cattle tick Rhipicephalus (Boophilus) microplus is the main parasite that affects livestock in tropical and subtropical regions of the world, causing large economical losses. Tick control methods are based on the application of chemical acaricides, which has resulted in
Publicado em: 2011
-
4. Endocrinologia e controle de vitelogênese em carrapatos / Endocrinology and control of tick vitellogenesis
Background: Ticks are distributed worldwide, with impacts on human and animal health. The cattle tick Rhipicephalus (Boophilus) microplus is the main parasite that affects livestock in tropical and subtropical regions of the world, causing large economical losses. Tick control methods are based on the application of chemical acaricides, which has resulted in
Publicado em: 2011
-
5. Degradação de vitelina e hemoglobina no carrapato bovino Rhipicephalus (Boophilus) microplus
O presente trabalho caracterizou alguns aspectos enzimáticos da digestão de vitelina e de hemoglobina no carrapato bovino Rhipicephalus (Boophilus) microplus. Um novo protocolo foi desenvolvido para a purificação de uma cisteíno endopeptidase de larvas do carrapato (R. microplus Larval Cysteine Endopeptidase; RmLCE). A seqüência parcial de aminoácido
Publicado em: 2010
-
6. Structural and functional analysis of VT1 and YP170B vitellins from the Rhabditid nematodes Oscheius tipulae and Caenorhabditis elegans. / Estudo das vitelinas VT1 e YP170B dos nematoides rabditídeos Oscheius tipulae e Caenorhabditis elegans: aspectos estruturais e funcionais.
The N-terminal region of OTI-VIT-1 was expressed and the recombinant polypeptides were purified. OTI-VIT-1 may be homologous to the vitellin YP170B from C. elegans. We identified an intron in the 5 region and two in 3region from Oti-vit-1. Monospecific antisera to PVIT1HisC confirmed that the gene Oti-vit-1 encodes VT1. The recombinant polypeptide P40-H, cor
Publicado em: 2009
-
7. Caracterização da Tick Heme-binding Aspartic Protease (THAP) na embriogênese do carrapato Rhipicephalus (Boophilus) microplus : análise da expressão e da atividade de degradação de vitelina
O carrapato Rhipicephalus (Boophilus) microplus é responsável por perdas econômicas substanciais na bovinocultura, acarretando o uso intensivo de acaricidas. Problemas com os resíduos químicos presentes na carne e no leite, o custo dos acaricidas e a seleção de populações de carrapato resistentes, têm estimulado o desenvolvimento de métodos de con
Publicado em: 2009
-
8. A reprodução em carrapatos e a avaliação de uma enzima de destaque neste processo como antígeno vacinal contra Rhipicephalus (Boophilus) microplus
Os carrapatos estão distribuídos por todo mundo e impactam tanto a saúde animal quanto humana. A espécie Rhipicephalus (Boophilus) microplus é o principal parasita que afeta a bovinocultura nas regiões tropicais e subtropicais do globo, causando grandes prejuísos econômicos. Os métodos de controle estão baseados no uso de acaricidas químicos, o qu
Publicado em: 2008
-
9. The nucleotide sequence of a nematode vitellogenin gene.
The nematode, Caenorhabditis elegans, contains a family of six genes that code for vitellogenins. Here we report the complete nucleotide sequence of one of these genes, vit-5. The gene specifies a mRNA of 4869 nucleotides, including untranslated regions of 9 bases at the 5' end and 51 bases at the 3' end. Vit-5 contains four short introns totalling 218 bp. T
-
10. The effect of ovary implants on juvenile hormone production by corpora allata of male Diploptera punctata
In the cockroach Diploptera punctata, vitellogenic basal oocytes stimulate juvenile hormone production by the corpora allata. Experiments with males were designed to determine whether oocytes must grow vitellogenically in order to stimulate juvenile hormone production. Two ovarioles with vitellogenic basal oocytes were implanted into unoperated and sham-oper
University of Arizona Library.