Differences to Abelson kinase ( ABL ) are observed in the DDR1 P-loop , where a b-hairpin replaces the cage-like structure of ABL .
O O B-GeneOrGeneProduct I-GeneOrGeneProduct O B-GeneOrGeneProduct O O O O O B-GeneOrGeneProduct O O O O O O O O O O B-GeneOrGeneProduct O