MapMan files for maize gene atlas from:
  Genome‐wide atlas of transcription during maize development
  Rajandeep S. Sekhon, Haining Lin, Kevin L. Childs, Candice 
  N. Hansey, C. Robin Buell, Natalia de Leon, Shawn M. Kaeppler
  The Plant Journal. Volume 66, Issue 4. May 2011. Pages 553-563.
  DOI: 10.1111/j.1365-313X.2011.04527.x