The Dr. Seuss Experiment (IMAGE)
Caption
A conceptual view of the competitive transplantation system used in the study published by researchers at Boston Children's Hospital in the July 23 issue of Nature. Blood stem cells were taken from zebrafish whose marrow was colored either red or green. The green cells were treated with different test chemicals, while the red cells were untreated. A mixture of the two was injected into other groups of zebrafish to see which color grafted better. The yellow fish show marrow of equal parts red and green; had the chemical worked, the marrow would have been predominantly green.
Credit
Ellen van Rooijen and Pulin Li
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