this sequence is shown in Figure 7.7.

Fig. 7.7. BLAST result for MT042778.

9999 was one SARS-CoV sequence submitted in 2003. In order

strate whether the sequence homology alignment approach will

ense to species comparison, a sequence from a very different

as used. The Yersinia pastis sequence (QANK01002681) was

a demonstration. The aim was to verify whether two species of

ly different families show a less similarity when their sequences

ed. In addition, it aims to verify whether two species of a closely

amily or the same family show a greater similarity when their

s are aligned. Theoretically, this Yersinia pastis species should

s similarity with MT042778, the SARS-CoV-2 species.

Needleman-Wunsch algorithm and the Smith-Waterman

m were applied to examine the similarity between these sequences.

9 shows the result. It can be seen that MT042778 (SARS-CoV-

a greater similarity with AB889999 (SARS-CoV) compared with

002681 (Yersinia pastis). This was as expected. The identity

ges were 76.2% and 96.5% using the Needleman-Wunsch

m and the Smith-Waterman algorithm to compare MT042778

CoV-2) with AB889999 (SARS-CoV). It was indeed about 80%

y as noted in an earlier study [Caldaria, et al., 2020].