In silico expression profile of putative AMTs and NRTs. Microarray data were obtained from The Bio-Array Resource for Plant Biology  for all family members from A. thaliana, O. sativa, and P. trichocarpa. Note, that AMT3s and AMT4s are members of the AMT2 family.
von Wittgenstein et al. BMC Evolutionary Biology 2014 14:11 doi:10.1186/1471-2148-14-11