While there is some controversy concerning the patenting of isolated genes and the way those patents are used, and there is controversy concerning patents on the diagnostic uses of genes (the real source of dispute in the Myriad court case), it is difficult to find controversy surrounding patents on genes that are used to manufacture therapeutic proteins (for an example of patents on therapeutic proteins, the drug candidate that is the subject of the early part of the movie 'Extraordinary Measures' was covered in part by a classic gene patent, U.S. Patent No. 6,770,468.There is also little controversy concerning the role of gene patents in the chemical industry—for instance in the manufacture of enzymes used in consumer products or industrial processes.