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The article discusses research conducted on cancer-stem-cells by developmental biologist Wei-Qiang Gao and colleagues at Genentech in South San Francisco, California. The team is primarily concerned with identifying prostate-cancer stem cells, but in order to accomplish that they also needed to identify the normal prostate stem cells.

The article analyzes the missing link between T lymphocytes and psoriasis. The observations of Immunologist Yan Zheng and his colleagues at the company Genentech in San Francisco, California are discussed in detail. An overview of the cause for the white cell infiltration into the skin and the role of IL-22 in causing the disease of psoriasis, through experimentation on mice, is presented. The article also presents the observations of Wenjun Ouyang on TH 17 and T22 to find the missing link.

Discusses a legal case about whether a plasmid discovered at and patented by the University of California at San Francisco contributed to the early success of Genentech, Inc. Evidence of the conflict in the pages of `Nature'; How the case shows the commercial pressures on the biotechnology industry.

Describes progress in the legal case in which the University of California, San Francisco, alleges that Genentech Inc. infringed on its patent for DNA for human growth hormone. Hormone leading to the development of the drug Protropin; Views of Genentech executives about the case; Details about key testimony; Problems with a paper published in `Nature' related to the case; Colleagues who have had to tesify against one another. INSET: Who's telling the truth about crucial plasmid?.