the octapeptide glu-ser-leu-ser-ser-ser-glu-glu , corresponding to the 14-21 sequence of bovine beta-casein a2 and 11 shorter and/or modified derivatives were synthesized and used as model substrates for three casein kinases : rat liver casein kinases 2 and 1 and a casein kinase isolated from the golgi-enriched fraction of lactating mammary gland ( gef-casein kinase ) .
C0108555
casein kinases 2
C0054846
casein kinase