1. 
   IL-12
   Synonym for interleukin-12 ... <cytokine> A 75 kD heterodimeric cytokine composed of disulfide-bonded 40 kD and 35 kD subunits that was originally identified by its ability to induce cytotoxic effector cells in synergy with less than optimal concentrations of interleukin-2. ... It is released ...
   Found op http://www.mondofacto.com/facts/dictionary?IL-12
   
   
2. 
   Il-12
   The Ilyushin Il-12 was a Soviet medium-range airliner first flown in 1946. The Ilyushin Il-12 was a low-wing cantilever monoplane of metal construction powered by two Ash-82FNV fourteen-cylinder two-row radial air-cooled engines providing a top speed of 365 kmh and a range of between 1250 km and 300...
   Found op http://www.probertencyclopaedia.com/browse/II.HTM
   
   
3. 
   IL-12
   One of a group of related proteins made by leukocytes (white blood cells) and other cells in the body. IL-12 is made mainly by B lymphocytes and macrophages. It causes other immune cells to make cytokines and increases the growth of T lymphocytes. It may also block the growth of new blood vessels. I...
   Found op http://www.cancer.gov/dictionary?expand=I
   
   
4. 
   Ilyushin Il-12
   (from the article `flight, history of`) ...by signing a license agreement to build the Douglas DC-3, equipped with Soviet engines. Although numerous examples continued to serve in the ...
   Found op http://www.britannica.com/eb/a-z/i/10
   
   

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