SARS-CoV-2 S1 (RBD) Delta B.1.617.2 (India), GFP/His-Tag Purity >95% "green" indicates fusion of the

"green" indicates fusion of the protease to green fluorescent protein (GFP)

TEV cleavage results in two cleavage products of 42

Sequence without tags (AA 1-306):SGFRKMAFPSGKVEGCMVQVTCGTTTLNGLWLDDVVYCPRHVICTSEDMLNPNYEDLLIRKSNHNFLVQAGNVQLRVIGHSMQNCVLKLKVDTANPKTPKYKFVRIQPGQTFSVLACYNGSPSGVYQCAMRPNFTIKGSFLNGSCGSVGFNIDYDCVSFCYMHHMELPTGVHAGTDLEGNFYGPFVDRQTAQAAGTDTTITVNVLAWLYAAVINGDRWFLNRFTTTLNDFNLVAMKYNYEPLTQDHVDILGPLSAQTGIAVLDMCASLKELLQNGMNGRTILGSALLEDEFTPFDVVRQCSGVTFQ

Cystatin C is a useful biomarker for assessing kidney function

and Pingnian He Patients with diabetes infected with COVID-19 have greater mortality than those without comorbidities

SARS-CoV-2 S1 (RBD) Delta B.1.617.2 (India), GFP/His-Tag Purity >95% "green" indicates fusion of theRecombinant protein of the receptor binding domain (RBD), Mutant (L452R T478K) of SARS CoV 2 (COVID 2019) Spike S1 from Wuhan pneumonia virus with C terminal His GFP Tag. The mutations L452R T478K are characteristic for the fast spreading SARS CoV 2 virus variants B. 1. 617 emerged in India. These mutations are affecting the receptor binding domain (RBD) of the spike protein, which the virus uses to bind to human cells receptors and enter them. Due to