SARS 3b Proteins and Enzymes

Severe Acute Respiratory Syndrome (SARS),an emerging disease characterized by atypical pneumonia, has recently been attributed to anovel coronavirus (SARS-CoV). The protein X2 was one of the nonstructural proteins of SARS-CoV (X1~X5), who's epitopes were defined by parallel comparison of SARS-CoV infected and non-infected human sera with EpitoscreenTM peptide array. The protein X2 of SARS-CoV, also named SARS 3b, shares little homology with proteins of other members of the coronavirus. SARS 3b protein is a putative uncharacterized protein.