mutation query by gene: switch to use the gene's genomic coordinates + padding
mutation query by gene: switch to use the gene's genomic coordinates + padding

ucscXena/ucsc-xena-client,ucscXena/ucsc-xena-client,ucscXena/ucsc-xena-client,ucscXena/ucsc-xena-client,acthp/ucsc-xena-client,acthp/ucsc-xena-client,ucscXena/ucsc-xena-client,acthp/ucsc-xena-client