Kippenhahn diagrams showing the internal structure of the gainer star with an initial mass of M_i, g = 1.50 M_⊙. The evolution stops when the donor star reaches core helium depletion, X_He, c < 0.2. The x-axis gives the age after ignition of hydrogen in units of Myr. The different layers are characterized by their M/M_⊙ values. Shown are the convection mixing (hatched green), semi-convection mixing (red), overshooting mixing (crosshatched purple), thermohaline mixing (hatched gold), and the surface of the star (solid black line).