Since the excavations and restoration of the original entrance of the passage observations from inside the tomb at sunrise on the spring and autumn equinox have revealed that the orientation of the passage allows the sun's rays to shine through to the chamber entering the back recess of the terminal cell.
12.
In experiments with non-human species, endogenous proteolytic cleavage within a cysteine-rich GPS ( G-protein-coupled-receptor proteolysis site ) domain resulted in two subunits ( a large extracellular N-terminal cell adhesion subunit and a subunit with substantial similarity to the secretin / calcitonin family of GPCRs ) being non-covalently bound at the cell membrane.
