NGC 4321 (SAB) non-weighted deprojected torque map (left panel), torque profile (upper central panel), comparison with values from the literature (lower central panel), rotation curve (upper right panel), and angular rotation curve (lower right panel). We show contours corresponding to [5σ, 15σ, 45σ, …, 0.9σ_max] in the CO map, where σ is the mean value of the gas map σ = 1.08 K km s⁻¹ and σ_max = 885.64 K km s⁻¹. The teal dashed line represents the nuclear bar radius registered by Querejeta et al. (2021). Symbols as in Fig. 3.