Exactly what gene-based inventions are patentable in Australia?

Recently, we reported on an Australian Patent Office decision – Arrowhead Research Corporation [2016] APO 70 (13 October 2016) (Arrowhead decision), which confirmed that gene-based pharmaceuticals, namely interfering RNA (iRNA) compositions, do represent patentable subject matter in Australia. This decision sets a significant legal precedent in relation to the patentability of iRNA compositions, which were