Gamma tubulin complex component 2 (GCP2) is 95-103 kDa protein which associates with two molecules of gamma tubulin and one molecule of gamma tubulin complex component 3 (GCP3), to form the gamma tubulin small complexes (gammaTuSCs). These complexes interact with GCP4, 5, and 6 to form the gamma tubulin ring complexes (gammaTuRCs), which are embedded in the microtubule organizing center matrix where they nucleate microtubules. The gammaTuRCs are also involved in the regulation of microtubule plus and minus end dynamics. Components of gamma tubulin complexes are highly conservative in eukaryotes.Synonyms: GCP-2, GCP2, Gamma-ring complex protein 103 kDa, Gamma-tubulin complex component 2, Grip103, Spc97, Spindle pole body protein Spc97 homolog