Upper panel: Na-O anticorrelation for HB stars in M 5; filled red squares are RHB stars, blue open squares are BHB stars. Lower panel: the same for RGB stars (from Carretta et al. 2009a). In this panel, we plotted with different symbols stars that might be expected to have descendants on the VBHB (stars bluer than the Grundahl jump: filled violet circles), BHB (open blue squares), RR Lyrae (filled green pentagons), and RHB (filled red squares) (see text).