Real-time tracking of phytochrome's ring D orientational changes during Pr photoisomerization: Two Pr isoforms with different photoisomerization yieldsY. Yang, M. Linke, T. von Haimberger, J. Hahn, R. Matute, L. González, P. Schmieder and K. HeyneEPJ Web of Conferences, 41 (2013) 05044DOI: https://doi.org/10.1051/epjconf/20134105044