In the association study , the plasma levels of ET-1 in 54 hypertensive patients having an amino acid substitution from Lys to Asn at position 198 were not different from those of hypertensives without the substitution .
O O O O O O O O O B-GeneOrGeneProduct O O B-DiseaseOrPhenotypicFeature B-OrganismTaxon O O O O O O B-SequenceVariant I-SequenceVariant I-SequenceVariant I-SequenceVariant I-SequenceVariant I-SequenceVariant O O O O O O B-DiseaseOrPhenotypicFeature O O O O