FRAP supported Salvador Allende in the 1964 presidential election, whereas NID supported Eduardo Frei.
The nucleolus ultrastructure can be visualized through an electron microscope, while the organization and dynamics can be studied through fluorescent protein tagging and fluorescent recovery after photobleaching (FRAP).
Succeeding to the FRAP left-wing coalition, it originally comprised most of the Chilean Left: the Socialist Party, the Communist Party, the Radical Party, the Social Democratic Party (Chile), and MAPU (Movimiento de Acción Popular Unitario).