Co-linearity of β-Galactosidase with Its Gene by Immunological Detection of Incomplete Polypeptide Chains

Abstract

Many nonsense mutants that map in the beta-galactosidase structural gene produce material that forms precipitin lines when tested by double diffusion on agar against antiserum prepared from native beta-galactosidase. Relative sizes of the cross-reacting materia!s measured by sucrose density gradient centrifugation are the same as sizes calculated from genetic mapping of nonsense mutants. Orientation of the protein to its gene is also indicated.