20 research outputs found
Transcription of nuclear DNA in nuclei isolated from plasmodia at different stages of the cell cycle of Physarum polycephalum
Sedimentation patterns of pulse-labeled RNA in the mitotic cycle of Physarum polycephalum
A novel physiological state characterized by continuous nuclear growth without entry into mitosis
Heat sensitive factor necessary for mitosis onset in Physarum polycephalum (temperature shift/heat shock/cycloheximide/ts mutant)
Evaluation of Myocardial and Peripheral Vascular Responses During Reaction Time, Mental Arithmetic, and Cold Pressor Tasks
Evolutionary history and global spread of the Mycobacterium tuberculosis Beijing lineage20
Mycobacterium tuberculosis strains of the Beijing lineage are globally distributed and are associated with the massive spread of multidrug-resistant (MDR) tuberculosis in Eurasia. Here we reconstructed the biogeographical structure and evolutionary history of this lineage by genetic analysis of 4,987 isolates from 99 countries and whole-genome sequencing of 110 representative isolates. We show that this lineage initially originated in the Far East, from where it radiated worldwide in several waves. We detected successive increases in population size for this pathogen over the last 200 years, practically coinciding with the Industrial Revolution, the First World War and HIV epidemics. Two MDR clones of this lineage started to spread throughout central Asia and Russia concomitantly with the collapse of the public health system in the former Soviet Union. Mutations identified in genes putatively under positive selection and associated with virulence might have favored the expansion of the most successful branches of the lineage</p