Deoxyhemoglobin: The form of hemoglobin without oxygen, the predominant protein in red blood cells.
Hemoglobin forms an unstable, reversible bond with oxygen. In its oxygen-loaded form it is oxyhemoglobin and is bright red. In the oxygen-unloaded form it is called deoxyhemoglobin and is purple-blue.
- Deoxyribonucleic acid
Deoxyribonucleic acid: DNA. One of two types of molecules that encode genetic information. (The other is RNA. In humans DNA is the genetic material; RNA is transcribed from it. In some other organisms, RNA is the genetic material and, in reverse fashion, the DNA is transcribed from it.) DNA is a double-stranded molecule held together […]
- Department of Energy (DOE).
Department of Energy (DOE).: One of the U.S. government agencies contributing to the Human Genome Project.
- Department of Health and Human Services
Department of Health and Human Services: The United States government’s principal agency for “protecting the health of all Americans and providing essential human services, especially for those who are least able to help themselves.” Also known as DHHS and HHS. The U.S. Department of Health and Human Services has two types of operating divisions: the […]
Depigmentation: Loss of color (pigment) from the skin, mucous membranes, hair, or retina of the eye. The color of the skin, mucous membranes, hair, and retina is due to the deposition of melanin, which is a coloring matter. Melanin is produced by specialized cells called melanocytes. Other terms pertaining to pigment include pigmentation (the presence […]
- Depo-Provera contraceptive
Depo-Provera contraceptive: Injectable progestin (Depo-Provera) was approved by the U.S. Food and Drug Administration (FDA) for contraception in 1992. It is injected by a health professional into the woman’s buttocks or arm muscle every three months. Depo-Provera prevents pregnancy in three ways: It inhibits ovulation, changes the cervical mucus to help prevent sperm from reaching […]