Tanaka M, Nishi M, Morimoto M, Sugimoto T, Kawata M. Imaging analysis of mineralocorticoid receptor and importins in single living cells by using GFP color variants. Cell Tissue Res. 2005 Jun;320(3):447–53. doi: 10.1007/s00441-004-0984-5. PMID: 15846517.