Schematic diagram of the structure of KLF1, GATA1, and KLF1-GATA1 fusion constructs. F1, F2, and F3 represent three finger domains of KLF1; CF and NF represent C- and N-fingers of GATA1; and R1, R2, and R3 represent three regions of the transactivation domain of GATA1. See the complete Figure 1 in the article by Zhu et al that begins on page 2276.