HEK 293 cells HEK 293 cells Human embryonic kidney 293 cells, also often referred to as HEK 293, HEK-293, 293 cells, or less precisely as HEK cells, are a specific cell line originally derived from human embryonic kidney cells grown in tissue culture. HEK 293 cells have been widely used in cell biology research for many years, because of their reliable growth and propensity for transfection. They are also used by the biotechnology industry to produce therapeutic proteins and viruses for gene therapy. HEK 293 cells were generated in 1973 by transfection of cultures of normal human embryonic kidney cells with sheared adenovirus
How to Make Gravy the US release of "Words and Music" by Vanguard Records. That year, "How to Make Gravy" was also issued as a US single but with a different cover: it depicts a roasted fowl on a serving tray held by a smiling woman with the words 'Christmas Single' included. Kelly and his nephew Dan Kelly recorded the song as part of Kelly's A – Z Tours from 2004 to 2010, it was issued on the 8× CD album, "The A – Z Recordings" (2010). "How to Make Gravy" is a song with a length of five minutes and ten seconds. The