This post was first published on April 4, 2010.   This is in furtherance of Mrs. Vinita Radhakrishnan's post regarding the US District Court decision on BRCA gene patents. Under the US Patent Law, anything that exists in nature is not patentable subject matter. This is also referred to as 'Product of Nature Doctrine'. The test for determining whether something exists in nature or not as laid down in Chakrabarty's case is whether a hand of man is involved in creating…