11.   After a picorna virus commandeers genetic machinery inside a cell nucleus, it sends messenger molecules out into the cytoplasm where proteins are made.

12.   But human cells can recognize the genes, and regularly make transcripts of the genes whose information is required to make proteins.

13.   But the problem is that the genes usually are silenced so that they do not direct cells to make proteins.

14.   But the very properties that make silk proteins strong also make them difficult to produce.

15.   Cancer cells trick the DNA into making a protein, telomerase, that keeps the telomeres from shrinking.

16.   DNA carries genes that make proteins to correct any damage the DNA might suffer.

17.   Experts say they believe the gene makes a protein that helps cancer cells grow and replicate.

18.   Experts believe that the gene makes a protein that helps cancer cells grow and replicate.

19.   Eye cells, for instance, use the genes that make proteins for vision.

20.   Finishing his tour of the plant, Anton plucked off his hair net and recalled how he once worked for a company that made soy proteins for food products.