C3, C-3, C.3, C03, C.III or C-III may refer to:

Life and biology

C3-convertase C3 convertase (''C4bC2b'', formerly ''C4b2a'') belongs to family of serine proteases and is necessary in innate immunity as a part of the complement system which eventuate in opsonisation of particles, release of inflammatory peptides, C5 con ...

, an enzyme *

Complement component 3 Complement may refer to: The arts * Complement (music), an interval that, when added to another, spans an octave ** Aggregate complementation, the separation of pitch-class collections into complementary sets * Complementary color, in the vi ...

, a protein of the innate immune system *

Apolipoprotein C3 Apolipoprotein C-III also known as apo-CIII, and apolipoprotein C3, is a protein that in humans is encoded by the ''APOC3'' gene. Apo-CIII is secreted by the liver as well as the small intestine, and is found on triglyceride-rich lipoproteins suc ...

, a human very low density lipoprotein * ATC code C03 ''Diuretics'', a subgroup of the Anatomical Therapeutic Chemical Classification System *

Castavinol C3 Castavinol C3 is a castavinol, a natural phenolic compound found in red wine Red wine is a type of wine made from dark-colored grape varieties - (red grapes.) The color of the wine can range from intense violet, typical of young wines, thr ...

, a natural phenolic compound found in red wines *

Cytochrome-c3 hydrogenase In enzymology, a cytochrome-c3 hydrogenase () is an enzyme that catalyzes the chemical reaction :2 H2 + ferricytochrome c3 \rightleftharpoons 4 H+ + ferrocytochrome c3 Thus, the two substrates of this enzyme are H2 and ferricytochrome c3, whe ...

, an enzyme *

Haplogroup C-M217 Haplogroup C-M217, also known as C2 (and previously as C3), is a Y-chromosome DNA haplogroup. It is the most frequently occurring branch of the wider Haplogroup C (M130). It is found mostly in Central Asia, Eastern Siberia and significant freq ...

, called C3 in older publications * In human anatomy, C3 may refer to: **

Cervical vertebra 3 In tetrapods, cervical vertebrae (: vertebra) are the vertebrae of the neck, immediately below the skull. Truncal vertebrae (divided into thoracic and lumbar vertebrae in mammals) lie caudal (toward the tail) of cervical vertebrae. In sauropsid s ...

, one of the cervical vertebrae of the vertebral column **

Cervical spinal nerve 3 The cervical spinal nerve 3 (C3) is a spinal nerve of the cervical segment The spinal cord is a long, thin, tubular structure made up of nervous tissue that extends from the medulla oblongata in the lower brainstem to the lumbar region of the v ...

* Clinical Cell Culture, a medical technology company * C03, Malignant neoplasm of gum ICD-10 code *

C3 Collaborating for Health C3 Collaborating for Health is a global, not-for-profit non-governmental organisation, based in London, that exists to find solutions to fight the epidemic of non-communicable diseases (NCDs). The C3 approach C3’s focus is on the main risk fac ...

, a health-promotion NGO * C3: an EEG electrode site according to the 10-20 system

Military

* C³, Command, control, and communications, a military concept *

C-3 (plastic explosive) C3, C-3, C.3, C03, C.III or C-III may refer to: Life and biology * C3 carbon fixation in plants * C3-convertase, an enzyme * Complement component 3, a protein of the innate immune system * Apolipoprotein C3, a human very low density lipoprotein ...

, a plastic explosive related to C4 * C-3, a United States military designation for the

Ford Trimotor The Ford Trimotor (also called the "Tri-Motor", and nicknamed the "Tin Goose") is an American Trimotor, three-engined transport plane, transport aircraft. Production started in 1925 by the companies of Henry Ford and ended on June 7, 1933, afte ...

* the designation for several German World War I and World War II armed reconnaissance aircraft ** AEG C.III **

AGO C.III The AGO C.III was a German reconnaissance biplane of World War I. It was a single experimental prototype derived from the manufacturer's AGO C.I, C.I design. Specifications References * Das Virtuelle Luftfahrtmuseum