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Much research in cell biology has traditionally centered on understanding how cells react to chemical signals such as diffusible signaling molecules.

Mr. Douglas said that when he brought up the idea of developing a diffusible scent for the observatory at a staff meeting, “A lot of people were like, ‘Really?’”

Normal retina releases a diffusible factor stimulating cone survival in the retinal degeneration mouse.

Pirhonen, M., Flego, D., Heikinheimo, R. & Palva, E. T. A small diffusible signal molecule is responsible for the global control of virulence and exoenzyme production in the plant pathogen Erwinia carotovora.

Such communication through pheromones or other diffusible substances points to a nonindividual autonomous mode of aging regulation.