BACKGROUND Although Cryptococcus laurentii has been considered saprophytic and its taxonomy is still being described, several cases of human infections have already reported. This study aimed to evaluate molecular aspects of C. laurentii isolates from Brazil, Botswana, Canada, and the United States. METHODS In this study, 100 phenotypically identified C. laurentii isolates were evaluated by s...

Ribosomal RNA precursors and mature 28S ribosomal RNA from HeLa cells display a highly reproducible secondary structure of hairpin loops after they are spread and examined in an electron microscope. This structure was used to map the linear arrangement of these molecules. Partial digestion with 3'-exonuclease from ascites cell nuclei established that the 28S RNA region is located at the 5'-end ...

Primarily saprophytic in nature, fungi of the genus Acremonium are a well-documented cause of mycetoma and other focal diseases. More recently, a number of Acremonium spp. have been implicated in invasive infections in the setting of severe immunosuppression. During the course of routine microbiological studies involving a case of fatal mycosis in a nonmyeloablative hematopoietic stem cell tran...

The extent of interspecific homology between D. melanogaster and D. virilis for ribosomal RNA and ribosomal protein was examined using the techniques of two-dimensional gel electrophoresis, and RNA-DNA filter hybridization. Only 2 of the 71 ribosomal proteins resolved were found to be species specific, while comparisons of soluble larval hemolymph protein patterns showed little similarity. Depe...

A human glutamate tRNA has been shown to form stable hybrids with 28S ribosomal RNA. This tRNA was purified from HeLa cell cytoplasmic RNA by RNA-RNA solution hybridization followed by the isolation of tRNA-28S rRNA complexes by hybridization-selection with ribosomal DNA or by recovery of the 28S peak from formamide-sucrose gradients. The single hybridizing tRNA species was identified as tRNAGl...

A new, biparental species of the genus Encarsia Förster (Hymenoptera: Aphelinidae), E. hera Lahey & Andreason, sp. nov. , is characterized based on morphological and molecular data. The parasitoid was reared from puparia its host, an undescribed grass-feeding aleyrodine Aleurocybotus Quaintance Baker (Hemiptera: Aleyrodidae) collected in Gainesville, Florida. same whitefly newly recorded Ch...

Abstract We establish a new genus of planocerid polyclad, Heteroplanocera gen. nov., based on species, H. katoi sp. collected at depth 245 m off the coast Izu Peninsula, West Pacific, Japan. nov. is distinguished from other genera by following characteristics: (i) pair nuchal tentacles, (ii) muscular bulb, (iii) spermiducal bulbs (instead seminal vesicle), (iv) free prostatic vesicle, (v) acces...

recent advances in dna based technology have made available a wide range of molecular characteristics for taxonomic and systematic studies of malaria vectors. one region of the anopheline mosquito genome that has received particular attention is the ribosomal dna. in this study, mosquitoes of the anopheles superpictus collected from a wide geographical distribution of iran were investigated for...