<span>The metabolic activity of a specific region of the living rat brain can be revealed by measurement of Fos protein concentration.
c-Fos is a proto-oncogene that is the homolog of the retroviral oncogene v-fos. It was first discovered in rat fibroblasts as the transforming gene of the FBJ MSV.</span>
Answer:
By eating things with protein in it. Sorry if this sounds too simple, but that's all it is.
B. The bases in DNA in the nucleus. The way our nitrogenous bases are arranged in DNA (A, T, C, and G) code for traits.
