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In low nitrogen environments, heterocyst differentiation is triggered by the transcriptional regulator NtcA. NtcA influences heterocyst differentiation by signaling proteins involved in the process of heterocyst differentiation.
The mechanisms of reproductive isolation are a collection of evolutionary mechanisms, behaviors and physiological processes critical for speciation.They prevent members of different species from producing offspring, or ensure that any offspring are sterile.
Progenitor cells have become a hub for research on a few different fronts. Current research on progenitor cells focuses on two different applications: regenerative medicine and cancer biology.
Many organisms, including aspen trees, reproduce by cloning, often creating large groups of organisms with the same DNA.One example depicted here is quaking aspen.. Cloning is the process of producing individual organisms with identical genomes, either by natural or artificial means.
Cell damage (also known as cell injury) is a variety of changes of stress that a cell suffers due to external as well as internal environmental changes. Amongst other causes, this can be due to physical, chemical, infectious, biological, nutritional or immunological factors.
Masayo Takahashi (高橋 政代, Takahashi Masayo, born June 23, 1961) is a Japanese medical physician, ophthalmologist and stem cell researcher.. Takahashi serves as a project research leader at the Riken Center for Developmental Biology in Kobe focusing on the clinical application of iPS Cell (induced Pluripotent Stem Cell) technology on macular degeneration.