Starving yeast and flatworms live longer when they express a gene called Sir2 (ScienceNOW, 8 May, 2003).
The cells in question express a protein, called Islet 1, which is present in the early stages of fetal heart formation.
The researchers developed zebrafish in which cells turn green when they express a gene called gata4, which is turned on in embryonic hearts.
The team reports that the adenomas grow from cells that express a gene called Lgr5+, which is also active in normal intestinal stem cells.
To look for other populations of heart muscle-producing cells, molecular oncologist Kenneth Chien at the University of California, San Diego, in La Jolla and colleagues took advantage of cells that express a gene called Isl1.
This circuit includes eight neurons per brain hemisphere, four small and four large ventral Lateral Neurons (LNvs), which specifically express a neuropeptide called pigment dispersing factor (PDF, Fig. 1B) [1B].
The osteoclasts express a factor called semaphorin4D (Sema4D) that inhibits bone formation during bone resorption [ 172].
They do, however, express a protein called DRH-1 that is related to the RIG-I protein found in mammals.
For instance, a subpopulation of germinal cells express a gene called nanos-2, which is involved in regulating gamete production across multiple taxa.
At a molecular level, osteoblasts express a receptor called RANKL (receptor activator of NF-κB ligand; also termed osteoprotegerin [OPG] ligand).
