Study on Characteristics of SARS Coronavirus Based on Z Curve

Spike protein is the most important membrane protein on the surface of SARS (Severe Acute Respiratory Syndrome) coronavirus. It associates with cellular receptors to mediate infection of their target cells. Inspired by this, this paper studies the genome sequences of S protein and SARS's receptor based on Z curve method. A kind of visualizing characteristics for SARS coronavirus is seized in this study. The results, derived from the comparisons among a large number of genome sequences, have proved that this kind of characteristics is special for SARS coronavirus. The characteristic maps can be used in the detection of SARS coronavirus to provide a nonstandard, simple and visualized detection approach, especially for the situation where the standard method's results are conflict. From this study, we have also viewed that Z curve initiates an effective way for analyzing gene sequences using a geometric approach.