Annotate with local reference bases (REF_BASES)
Category Variant Annotations
OverviewLocal reference context at a variant position. The annotation gives ten reference bases each to the left and right of the variant start and the start base for a total of 21 reference bases. Start position is defined as one base before indels. For example, the reference context AAAAAAAAAACTTTTTTTTTT would apply to a SNV variant context with ref allele C and alt allele G as well as to a deletion variant context with ref allele CT and alt allele C.
GATK version 220.127.116.11 built at Sat, 23 Nov 2019 17:42:42 -0500.