Here is an informed summing up by Dennis Crouch at PatentlyO: "What are the consequences [of the ruling]? My immediate reaction is that for most practical applications, the Court's holding means that even though the broadest possible biotechnology product claims (to the isolated DNA itself) aren't going to be patentable, the key elements in making and using a biotechnology-based invention are still going to be protectable via patents (Part III of the Court's opinion makes this especially clear). This will allow researchers and competitors a little bit of wiggle room to design around biotechnology patents because they can use the basic isolated sequence but there will still be substantial limitations on what they can do with that isolated sequence. For this reason, I'm skeptical that the Court's opinion will have a negative effect on the incentives for creating biotechnology-based applications. To the contrary: by affirming that cDNA can be patented, it may strengthen the incentives for investing in research in this area." (http://www.patentlyo.com/patent/2013/06/myriad-isolated-dna-...)