Complex sentence: Hsp90 binds both endothelial nitric oxide synthase and soluble guanylate cyclase, and a downstream kinase of the nitric oxide cell signalling pathway, protein kinase G, phosphorylates a small heat shock protein, hsp20.
Split into simpler sentences: Hsp90 binds both endothelial nitric oxide synthase and soluble guanylate cyclase. A downstream kinase of the nitric oxide cell signalling pathway, protein kinase G, phosphorylates a small heat shock protein, hsp20.