Molecular & Cell Biology


Caltech researchers separate blood stem cells from other bone marrow cells and load them onto a newly developed microfluidic chip. Fluorescent signals indicate the presence of secreted proteins with one...
In the battle against infection, immune cells are the body's offense and defense—some cells go on the attack while others block invading pathogens. It has long been known that a population of blood stem cells that resides in the bone marrow generates all of these immune cells. But most scientists have believed that blood stem cells participate in battles against infection in a delayed way, replenishing immune cells on the front line only after they become depleted.

Molecular & Cell Biology


This is a photo of Brookhaven National Laboratory biochemist Chang-Jun Liu with Mingyue Gou, Huijun Yang, Yuanheng Cai and Xuebin Zhang.
Plant growth is orchestrated by a spectrum of signals from hormones within a plant. A major group of plant hormones called cytokinins originate in the roots of plants, and their journey to growth areas on the stem and in leaves stimulates plant development. Though these phytohormones have been identified in the past, the molecular mechanism responsible for their transportation within plants was previously poorly understood.




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