31. In both cases, the A-domains carry up to three divalent cation binding sites. 32. Divalent organotin compounds are uncommon, although more common than related divalent organogermanium and organosilicon compounds.33. Divalent organotin compounds are uncommon, although more common than related divalent organogermanium and organosilicon compounds. 34. This reflected the belief at that time that thorium and the rare earth metals were divalent . 35. The free carboxyl groups interact with cations to form insoluble pectic acid divalent metal ion complexes. 36. NaPi that couples with 2 Na + and 1 divalent Pi are classified as NaPi IIc. 37. The passage of these divalent ions inhibit the current carried by Na + and K +. 38. The substituent groups may be divalent or trivalent, yielding ions such as iminium and nitrilium. 39. These are Watson-Crick base pairs where the divalent cation in coordinated to the nucleobases. 40. This gene encodes an inwardly rectifying K + channel that may be blocked by divalent cations.
