- Amino acids and Nucleotide identities and divergence of our partially sequenced ACoV isolates comparable to other selected strains including vaccinal strains. The table utilizes a comparative alignment of the S1 gene in which, the S1 nucleotide identity percentage of our six Egyptian isolates (GI-23, GI-1, GI-12) ranges from 79 to 100% comparable to other referential strains. Besides, the amino acids identity percentage of these isolates ranges from 97 to 100% comparable to various referential strains