DESCRIPTION : The FH mutation database is a part of the TCA cycle gene mutation database ( formerly the succinate dehydrogenase gene mutation database ) and is based on the Leiden Open ( source ) Variation Database ( LOVD ) system .
O O O B-GeneOrGeneProduct O O O O O O O B-ChemicalEntity O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O