Liver kinase B1 ( LKB1 ) is a serine/threonine protein kinase ubiquitously expressed in mammalian cells .
B-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct O B-GeneOrGeneProduct O O O B-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct O O O O O O