. "Catalysis of the reaction: ATP + low-density lipoprotein L-serine = ADP + low-density lipoprotein O-phospho-L-serine." . . "STK7" . "low-density-lipoprotein particle receptor kinase activity" . "[low-density lipoprotein receptor] kinase activity" . "ATP:low-density-lipoprotein receptor-L-serine O-phosphotransferase activity" . "ATP:low-density-lipoprotein-L-serine O-phosphotransferase activity" . "LDL receptor kinase activity" . "low-density lipoprotein receptor kinase activity" . "low-density-lipoprotein kinase activity" . "low-density-lipoprotein receptor kinase (phosphorylating) activity" . "low-density-lipoprotein receptor kinase activity" . .