Previous molecular analysis of the Octopus Spring cyanobacterial mat revealed numerous genetically distinct 16S rRNA sequences from predominant Synechococcus populations distantly related to the readily cultivated unicellular cyanobacterium Synechococcus lividus. Patterns in genotype distribution relative to temperature and light conditions suggested that the organisms contributing these 16S rR...

Acremonium chrysogenum, the fungal producer of the pharmaceutically relevant beta-lactam antibiotic cephalosporin C, is classified as asexual because no direct observation of mating or meiosis has yet been reported. To assess the potential of A. chrysogenum for sexual reproduction, we screened an expressed sequence tag library from A. chrysogenum for the expression of mating type (MAT) genes, w...

Temperatures in the Arctic have increased by an astounding 1 °C in response to anthropogenic forcing over the past 20 years and are expected to rise further in the coming decades. The Pliocene (2.6–5.3 Ma) is of particular interest as an analog for future warming because global temperatures were signifi cantly warmer than today for a sustained period of time, with continental confi gurations si...

MAT-B1 and M A I -( 1 ascites subîmes of the 13762 rat mammary adenocarcinoma both contain sialomucin as a major cell surface compo nent and are resistant to cytolysis by normal rat spleen lymphocytes |3 ±2% (SD) and O ±1%, respectively). Susceptibility to lysis did not increase following treatment of cells with neuraminidase, fucosidase, or aor 0-galactosidase. Treatment with trypsin signif...

background: this study is performed to reveal most common species and subspecies of leptospires that are main causes of hu­man leptospirosis in guilan, northern province of iran. methods: we performed igm-elisa and mat on 282 blood samples from patients who attended to 3 hospitals in the flat area of guilan province with clinical symptoms consisted with leptospirosis.  all specimens with titers...

The residual serological reactivity observed in patients cured of visceral leishmaniasis (VL) represents the major factor underlying the low efficiency of most anti-Leishmania serological approaches to assess posttherapeutic cure in VL. Herein, we have described a detuned flow cytometry-based methodology to detect anti-live (FC-ALPA-immunoglobulin G [IgG]) and anti-fixed (FC-AFPA-IgG) L. chagas...

BACKGROUND The oxidation of the methionine adenosyltransferase (MAT) by the combined impact of peroxides contaminating parenteral nutrition (PN) and oxidized redox potential of glutathione is suspected to explain its inhibition observed in animals. A modification of MAT activity is suspected to be at origin of the PN-associated liver disease as observed in newborns. We hypothesized that the cor...

In most fungal ascomycetes, mating is controlled by a single locus (MAT). Fungi requiring a partner to mate are heterothallic (self-sterile); those not requiring a partner are homothallic (self-fertile). Structural analyses of MAT sequences from homothallic and heterothallic Cochliobolus species support the hypothesis that heterothallism is ancestral. Homothallic species carry both MAT genes in...

In this chapter, we examine the typology of relative clauses. We will define relative clauses as follows: (1) A relative clause (RC) is a subordinate clause which delimits the reference of an NP by specifying the role of the referent of that NP in the situation described by the RC. Since the NP whose reference is being delimited is in the matrix clause, we will call it NP mat , and we will call...