LH2 splice variants, but not LH1 and LH3, interact with FKBP65. (A) Western blot detection of 3×FLAG-tag co-IP complexes from HEK293T cells overexpressed with combinations of LH2A-FLAG, LH2B-FLAG, and FKBP65. (B) Western blot detection of 6×His-tag co-IP complexes from HEK293T cells overexpressed with combinations of LH1-His, LH2-His, and FKBP65.