Tandem Quadruplication of HMA4 in the Zinc (Zn) and Cadmium (Cd) Hyperaccumulator Noccaea caerulescens Ó Lochlainn, Seosamh ; Bowen, Helen C. ; Fray, Rupert G. ; Hammond, John P. ; King, Graham J. ; White, Philip J. ; Graham, Neil S. ; Broadley, Martin R. Abstract Publication: PLoS ONE Pub Date: March 2011 DOI: 10.1371/journal.pone.0017814 Bibcode: 2011PLoSO...617814O