The document discusses stem cell patentability in Europe. It notes that pluripotent stem cells can form all tissues but not extra-embryonic tissue, while totipotent stem cells can form a whole organism. The European Patent Convention prohibits patents on inventions that exploit human embryos. However, stem cell patents are allowed if they do not require human embryo destruction or use embryos for commercial purposes. Recent court cases have further clarified these guidelines around patenting stem cells and cell lines derived from embryos. National laws on stem cell patents vary and ethical views continue evolving over time.