OFFICE MEMORANDUM ® STANFORD UNIVERSITY

Date: July 7, 1960
To . File

From

SuBJECT: Seminar given by Dr. Sydney Brenner _

He tried to corrolate the entry of new
Pzo into newly synthesized RNA of phage infected
bacteria. His principal finding was that the
P 2 which was introduced after phage infection
was still associated with RNA of a density
corresponding to that that was synthesized in
the pre-infected bacteria. This he considers
to support the hypothesis that the new component
in phage infected bacteria is a minor addition,
so-called X RNA, to the preexistent ribosome
the bulk of which is concerned with structural
or other functions.