Learn More
For self-pollinating plants to reproduce, male and female organ development must be coordinated as flowers mature. The Arabidopsis transcription factors AUXIN RESPONSE FACTOR 6 (ARF6) and ARF8 regulate this complex process by promoting petal expansion, stamen filament elongation, anther dehiscence, and gynoecium maturation, thereby ensuring that pollen(More)
When attacked by insects, plants release mixtures of volatile compounds that are beneficial for direct or indirect defense. Natural variation of volatile emissions frequently occurs between and within plant species, but knowledge of the underlying molecular mechanisms is limited. We investigated intraspecific differences of volatile emissions induced from(More)
A gene (nat) conferring resistance to the streptothricin antibiotic nourseothricin (Nc) was cloned from the producer Streptomyces noursei into Streptomyces lividans on the vector pIJ702 to form pNAT1. The nat gene was localized on a 1-kb SalI-MboI fragment, which also carries the nat promoter. Divergent promoter activity from the nat promoter region was(More)
AIMS To determine the pattern of macrophage infiltration in colon cancers and its correlation with clinicopathological characteristics. METHODS AND RESULTS Colon cancers from 100 patients were arrayed into a tissue microarray (TMA). Four cores per tumour were taken: three from the invasion front (IF) and one from the tumour surface (TS). Macrophages were(More)
The effect of streptothricin F on macromolecular syntheses in intact cells and cell-free protein synthesis of E. coli was studied. The results indicate that protein synthesis is the primary site of inhibition by streptothricin F in growing E. coli cells. Cell-free polypeptide synthesis from E. coli directed by poly (U) was inhibited, while poly (A) and poly(More)
To obtain information about the normal range of IgE concentration in serum a random population of male and female patients was divided into 14 age groups. Based on the mean values (x +/- 1s) an age dependency is clearly recognizable with an increase of the IgE concentration at one and two years of age, a constant IgE concentration during the middle age(More)
Synthesis and Antibacterial Activity of Benzoylaminoacyl Penicillins and Related Compounds with and without Acylated Catechol Substituents. Syntheses of benzoyl, cinnamoyl, and benzoylhydrazido glyoxyloyl aminoacyl penicillins with and without acylated catechol substituents by condensation of corresponding acids or acylchlorides with ampicillin or(More)
The polyene macrolide antibiotics are active against yeast, fungi, and other eukaryotic cells, but are with a few exceptions inactive against bacteria. The resistance of bacteria against these compounds is usually explained by the absence of sterols in their cells, the target sites of polyene antibiotics. However, in our experiments with mycotrienin,(More)