a, Western blot with α-BAK1 antibodies. Blots were stained with Coomassie brilliant blue (CBB) for loading control. b, Co-immunoprecipitation between FLS2 and BAK1 using α-FLS2 and α-BAK1 antibodies. Two-week-old seedlings were treated with water (−) or 100 nM flg22 (+) for 10 min before protein extraction. Blots were stained with Coomassie brilliant blue (CBB) for loading control. c, Representative images of rosettes from 4- to 5-week-old plants. d, Representative images of rosettes from 5-week-old plants. Same control plants used in (d) were also presented in Extended Data Figure 4c. e, Western blot with α-BAK1 antibodies. Blots were stained with Coomassie brilliant blue (CBB) for loading control. a-e, Experiments were repeated three times with similar results. For blot source data, see Supplementary Figure 1.