Update and Supplementary Articles Proteins of SARS CoV-2, Which Causes COVID-19, and the Interacting Proteins.

Coronavirus disease 2019 (COVID-19), which is the pandemic caused by the virus, severe acute respiratory syndrome coronavirus-2 (SARS CoV-2), first appearing in December 2019, continues to confound the world. In this update we provide insights into how some of the new mutant variant strains of SARS CoV-2 have evolved to be more infective. We also introduce our supplement of the special issue on the topic of the proteins of SARS CoV-2 in the Protein Journal, which follows this introduction.