Karr, T L Participation of guanine nucleotides in nucleation and elongation steps of microtubule assembly. [electronic resource] - Proceedings of the National Academy of Sciences of the United States of America Nov 1979 - 5475-9 p. digital Publication Type: Journal Article ISSN: 0027-8424 Standard No.: 10.1073/pnas.76.11.5475 doi Subjects--Topical Terms: AnimalsBrain--metabolismCattleGuanine Nucleotides--metabolismGuanosine Diphosphate--metabolismGuanosine Triphosphate--metabolismGuanylyl Imidodiphosphate--metabolismMicrotubules--metabolismProtein BindingTubulin--metabolism