Abstract
Transmissible gastroenteritis virus (TGEV) has a single-stranded, positive-sense RNA genome of more than 20 kb (Brian et al., 1980; Rasschaert et al., 1987) and three structural proteins: S, N and M, with 1447, 382 and 262 amino acids, respectively (Kapke and Brian, 1986; Laude et al., 1987; Rasschaert and Laude,
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