Research:Extreme expansion of the olfactory receptor gene repertoire in African elephants and evolutionary dynamics of orthologous
gene groups in 13 placental mammals
Yoshihito Niimura,
Atsushi Matsui,
and Kazushige Touhara
Genome Res. September 2014 24: 1485-1496; Published in Advance July 22, 2014, doi:10.1101/gr.169532.113