Radial profiles of Σ_SFR (original unsubtracted data), Σ_H I, Σ_H2 and Σ_H I+H2 for all nine galaxies in the sample. The x-axis presents the galactocentric radius normalised by r₂₅ (bottom) and in arcsecs (top). The y-axis presents Σ_gas in units of M_⊙ pc⁻² and Σ_SFR in units of 10⁻³ M_⊙ yr⁻¹ kpc⁻² (the scale range is the same for all galaxies). Σ_H2 (red curves) and Σ_SFR (brown and black curves) show a similar radial falloff for all galaxies. Σ_H I (blue curves) have a relatively flat radial profile, usually a deficit towards the centre and show an upper limit of ∼10 M_⊙ pc⁻².