OH line profiles generated using the data from the low-resolution GMRT-central. The OH line profiles were extracted from a circular region with sizes of 60"×60" centered at the position given by Haynes et al. (2018; see Table B.1 and Fig. 1). The arrow represents the peak frequency of the line profiles given by Haynes et al. (2018). The red line profiles of AGC 749309 represent the ALFALFA spectra of this source from Haynes et al. (2011).