1. epe81146ntion concerns a soft, torsionally elastic, acoustically isolating shaft coupling with a hub element (1) and an entrainer element (4) designed in the form of sheet-metal supports.

2. Firstly, all of the Bilins in PC645 are covalently attached to the protein at the ring A position by a Cys linkage, and the DBVs in the center of the protein have an additional linkage at ring D to immediately anchor that part of the otherwise torsionally-active part of the chromophore