“…However, the NS proteins migrate on SDSpolyacrylamide gels with apparent molecular weights of 40000 to 70000, depending on the degree of bisacrylamide cross-linking (Bell et al, 1984;Bell & Prevec, 1985;Kingsford & Emerson, 1980;Knipe et al, 1975 ;Obijeski et al, 1974;Wunner & Pringle, 1972). The aberrant mobility of NS is clearly seen when it migrates more slowly than the N protein, which has a molecular weight of 47300 (IND serotype; Gallione et al, 1981) or 47800 (NJ serotype; Banerjee et al, 1984); e.g. in the studies reported by Lesnaw et al (1979), Maack & Penhoet (1980), Patton et al (1984) and Pringle et al (1981).…”