HEK 293 cells may vary. The following proteins of interest (among many others) are commonly found in untreated 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
A Change of Heart (How I Met Your Mother) Cohn of Television Without Pity graded the episode at B−. Robert Canning of IGN gave the episode a rating of 8.5 out of 10, saying that Nora was likeable and that he enjoyed the interaction between the friends, who even managed to make "silly filler plots" enjoyable. A Change of Heart (How I Met Your Mother) "A Change of Heart" is the 18th episode of the sixth season of the CBS sitcom "How I Met Your Mother" and the 130th episode overall. It originally aired on February 28, 2011. After Nora announces her intention to marry and settle down, Barney