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Comparison of PKA and PrKX; sequence alignment between the human catalytic subunit of PKA alpha (Swiss-Prot accession no. P17612) and PrKX (human PKX1 Swiss-Prot accession no. P51817) with the program CLUSTAL (pcgene). Asterisks, identical amino acids; ellipses, conserved amino acids; boldface, amino acids conserved within protein kinases; underlining, functional residues identified within PKA as previously identified (11a, 43a).
