Abstract
* From previous published reports the notation E2 and E3 are the cleavage products of the cellular precursor protein NVP 6268 for Semliki Forest virus; for Sindbis virus, E2 is the product of the cellular Precursor noted as PE2.
† A relationship between the amino-acid sequences of a polypeptide and those of virus structural polypetides should be determined, before the p-molecular weight terminology is used.