The catalytic subunit C-beta of PKA (PRKACB) is a member of the Ser/Thr protein kinase family (the PKA catalytic subunit consist of three gene products: C-alpha, C-beta, and C-gamma) and has been assigned to human chromosome region 1p36.1. PRKACB is derived from a gene distinct from C-alpha and shows tissue-specific expression. At the amino acid level C-alpha and C-beta showed 93% homology. Recombinant full-length human PRKACB was expressed by baculovirus in Sf9 insect cells using a N-terminal GST tag.

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