The plasma membrane H(+)-ATPase AHA2 of Arabidopsis thaliana, which belongs to the P-type ATPase superfamily of cation-transporting ATPases, pumps protons out of the cell. To investigate the mechanism of ion transport by P-type ATPases we have mutagenized Asp(684), a residue in transmembrane segment M6 of AHA2 that is conserved in Ca(2+)-, Na(+)/K(+)-, H(+)/K(+)-, and H(+)-ATPases and which coo...

aim : the aim of this study was to identify and compare the pattern of acute viral hepatitis in two regions of iran. background : the epidemiological pattern of acute hepatitis varies across the globe depending on geographic region, health status, socioeconomic conditions and differences in exposure to etiological factors. patients and methods : a cross-sectional study was carried out among 357...

Recent evidence suggests that the transmembrane topology of ionotropic glutamate receptors differs from other members of the ligand-gated ion channel superfamily. However, the structure of the segment linking membrane domains M3 and M4 (the M3-M4 loop) remains controversial. Although various data indicate that this loop is extracellular, other results suggest that serine residues in this segmen...

in this article, we discuss clinical manifestations, laboratory results, and radiological findings in an old man with suppurative tender mass in the neck, accompanied by, fever, weight loss, malaise, fatigue, night sweat, cough, vomiting, anddysphagia. pharyngeal exam revealed a huge retropharyngeal abscess.

academic failure of students is one of the basic problems in higher education centers in iran that, not only causes to waste time and current charges in educational centers, but also leads to psychical, mental, familial and social problems for students. therefore, this study has been done in order to determine the value of academic success of students of zahedan medical university and its effec...