Central intersect oxygen abundance as a function of spectroscopic mass of a galaxy. The galaxies with a large offest between the position angles of the major kinematic and photometric axes (ΔPA > 20°) are shown by plus signs (for galaxies with signs of interactionis) and by circles (for seemingly non-interacting galaxies). The grey points denote MaNGA galaxies with ΔPA < 20° from Pilyugin et al. (2019).