FIG. 1.

Identified and potential morphological determinants within the M-PMV Gag precursor protein. The structure as inferred from the major proteolytic products of processing by the viral protease is shown. These domains are indicated from the N terminus to the C terminus as follows: p10MA, matrix; pp24/16, phosphoprotein; p12; p27CA, capsid; p14NC, nucleocapsid; and p4. Within these domains are depicted discrete amino acid sequences for which specific morphologic functions have been predicted or defined. The N-terminal myristic acid modification is also shown. The specific amino acid sequences that comprise the two domains of interest in this report are shown below. For the cytoplasmic targeting-retention signal, a previously defined arginine residue critical for function is displayed in outline.