Velocity of galaxies with respect to the group mean velocity vs. the projected distance from the group centre D_gr at the brightest galaxy of the first component in Gr3 (BGG1) for the components of the group Gr3. Red symbols show galaxies with old stellar populations (D_n(4000)≥1.55), and blue symbols denote galaxies with young stellar populations (D_n(4000)< 1.55). Filled circles denote galaxies from the component C1, squares from component C2, and triangles from component C3. Red stars show the location of the BGG of each component, and orange stars correspond to AGNs.