Receptor Binding Domain of the spike protein sequence alignment of SARS-CoV-2 and other related Coronaviruses. Sequence aligment for the interacting domain of SARS-CoV-2 (MN938384), Bat-CoV (MN996532 and MG772933) and SARS-CoV (NC004718). The key amino acids described for the interaction with ACE2 are shown in red, and in blue others amino acid related with the interaction in SARS-CoV2. (Lines (-) = same amino acid, dots (.) =deletion)