ZmVAP27‐1 major sperm domain (MSD) is required for the interaction with ZmPIP2;5. (a) Domain composition of the VAP27 proteins that interact with ZmPIP2;5. CCD, coiled‐coil domain; TMD, transmembrane domain. (b) Fluorescence ratiometric quantification from bimolecular fluorescence complementation (BiFC) experiments with the pairs PIP/PMA (YFPn‐ZmPIP2;5/YFPc‐NpPMA2), PIP/VAP (YFPn‐ZmPIP2;5/YFPc‐ZmVAP27‐1), PIP/ΔMSD (YFPn‐ZmPIP2;5/YFPc‐ZmVAP27‐1ΔMSD), PIP/ΔTMD (YFPn‐ZmPIP2;5/YFPc‐ZmVAP27‐1ΔTMD), PIP/ΔCCD (YFPn‐ZmPIP2;5/YFPc‐ZmVAP27‐1ΔCCD), and PIPΔC/VAP (YFPn‐ZmPIP2;5ΔC/YFPc‐ZmVAP27‐1). For each scatter plot, the lines indicate the mean ± SE. The Kruskal–Wallis and Dunn’s multiple comparison test were used to calculate the statistical difference between the negative control and the remaining constructs (***, P < 0.001; *, P < 0.05; ns, not significant). This experiment was repeated twice.