two proteins of 53,000 and 56,000 molecular weight which co-migrate with flagellar and chick brain tubulin on sds-polyacrylamide gels and which selectively co-assemble with chick brain tubulin during in vitro microtubule assembly are synthesized by polyribosomes ( or polyadenylated mrna ) from deflagellated cells .
C1156032
microtubule assembly
C0007634
cells