Sample of molecular line profiles of galaxy centers observed with the IRAM 30 m telescope. Galaxy and transition depicted are identified at the top of each panel. The top row shows J = 1 − 0 observations of (in each panel from left to right) HNC, HCO⁺, and HCN observed in 2010. The middle row shows the same lines and includes the C₂H at the very right, observed in 2011. The bottom row shows J = 3 − 2 observations of HCO⁺ (left) and HCN (right). In all panels the vertical scale is intensity (K) and the horizontal scale is velocity V(LSR) in km s⁻¹.