Far from being silent relics, many pseudogenes are transcribed into RNA, some exhibiting a tissue-specific pattern of activation.

FORBES: The Myth ... of the Myth of Junk DNA

One theory, which may explain its failure against breast cancer, is that there may be tissue-specific proteins that spur tumor growth in the absence of VEGF.

FORBES: Magazine Article

CB2 receptors, located predominantly in peripheral tissue, exist at very low levels in the CNS. With the development of receptor-specific antagonists, additional information about the roles of the receptors and endogenous cannabinoids in the modulation of pain has been obtained.

FORBES: Billionaire May Try to Legalize Medical Marijuana in Ohio