There's a human chip available. We're about to embark on a study of skeletal muscle from Rhesus monkeys varying in age and also in caloric intake. We think, however, that probably won't be a problem, at least for many of the genes that may be most important, and those are the ancient, highly conserved kinds of molecules, such as heat shock factors and the like, which have emerged as being very important. We're collecting muscle biopsies now and should have those data in about three months if all goes well. We need about 100 mg of tissue.
Different people have different genes.
The experiments we're doing don't actually address differences in genes among human beings because the DNA chip doesn't allow this. It just gives you the level of expression of different genes. In other words, you're saying you can't vary the genes. They simply give you one choice. You could have a custom chip at some point.