My understanding w.r.t. DNA is that naturally occurring DNA is full of "junk" sequences that do nothing relevant to the proteins of interest (whether they do an

My understanding w.r.t. DNA is that naturally occurring DNA is full of "junk" sequences that do nothing relevant to the proteins of interest (whether they do anything else is an open question). The patented sequences omit the "junk" DNA. Whether these omissions of "junk" DNA raise the matter to the level patentable material is subject to differing opinion, but the courts have ruled.