41.   Karen Wooley, the chemist who created them, has shown that her knedels can penetrate living cells when attached to a protein that acts as a key.

42.   Langer contributed polymers which supported the cells and helped them grow into the right shape, but would later dissolve naturally, leaving only the living cells.

43.   Meanwhile, more and more dissolved substances are concentrated in the sap within their living cells.

44.   Mine was essentially a shriveled blob of scar tissue, with a dwindling number of living cells struggling to keep me alive.

45.   Montemagno has also envisioned microbe-size robots that interact with the machinery inside living cells, somewhat like a virus, to produce healing drugs.

46.   On the other hand, the genetic code that instructs a living cell to produce a particular protein is very specific.

47.   Only one bioengineered product containing living cells has been approved by the Food and Drug Administration.

48.   One of those events was the division of the first living cells into three major kingdoms, known as archaea, bacteria and eukarya.

49.   Purdey is awaiting the results of a second set of experiments, this time using phosmet on a living cell.