is AA variant of is characteristic AA variant of has mutated from has amino acid position glycine arginine N-RG203KR RG203KR in SARS-CoV-2 N protein 203 204 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7387429/ RG203KR An aa-changing SNP triplet GGG28881AAC that occurs in a Nucleocapsid protein of a SARS-CoV-2 virus.It is a signature variant of SARS-CoV-2 clade GR. An aa-changing SNP triplet GGG28881AAC that occurs in a Nucleocapsid protein of a SARS-CoV-2 virus. This mutations AA at positions in 203 and 204 into lysine and arginene. It is a signature variant of SARS-CoV-2 clade GR. https://www.gisaid.org/references/statements-clarifications/clade-and-lineage-nomenclature-aids-in-genomic-epidemiology-of-active-hcov-19-viruses/ Oliver He SARS-CoV-2 Alpha variant SARS-CoV-2 Zeta variant SARS-CoV-2 Theta variant SARS-CoV-2 Omicron variant AA variant in SARS-CoV-2 N protein LKR region