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
How Are We to Live? the key for a satisfactory life resides on its purpose and how crucial for that purpose a commitment to an ethical life is. This connects with the argument that the pursuit of self-interest is self-defeating. He argues that altruism can be genuine - not just enlightened self-interest, and offers examples of people who sacrificed their lives to save people from Nazis to make this point. Singer comments on the effect of having the widest perspective possible on our ethical decisions; on how our rational capability sometimes leads us to change our goal; and on the paradoxical opportunity that the existence