UniProt human: www.uniprot.org/uniprot/Q9BYF1 It is interesting to see in the Mutagenesis how many known mutations can increase or decrease SARS-CoV-2 S protein binding affinity.
www.youtube.com/watch?v=6DxlkxA82FM COVID-19 Symposium: Entry of Coronavirus into Cells | Dr. Paul Bates