nonpermissive conditions

nonpermissive conditions

  1. (genetics) (also called restrictive conditions) conditions under which an ORGANISM or CELL expresses a conditional MUTATION (see CONDITIONAL MUTANT and displays the MUTANT PHENOTYPE. For a CONDITIONAL LETHAL mutation, nonpermissive conditions will be lethal, causing death of the MUTANT.
  2. (virology) conditions in which VIRUS INFECTION and MULTIPLICATION do not occur in a cell.
References in periodicals archive ?
mreD cells was not a secondary effect of their spheroidal shape came from study of a pbp2ts strain which, when grown under nonpermissive conditions, also undergoes a rod-to-sphere transition.
The earliest literature has offered support and a rationale for providing counseling services under nonpermissive conditions (Arbuckle & Boy, 1961; Beier, 1952; Gometz & Parker, 1968; Snoxell, 1960).
Comparison of the permissive and nonpermissive conditions allows the identification of mutants that drop out (that is, do not grow) under nonpermissive conditions.