Whats the difference between an nsv and an nssv?
nsv and nssv are accession prefixes for variant regions and variant calls (or instances), respectively. Typically, one or more variant instances (nssv – variant calls based directly on experimental evidence) are merged into a variant region (nsv – a pair of start-stop coordinates reflecting the submitters’ assertion of the region of the genome that is affected by the variant instances). The ‘n’ preceding sv or ssv indicates that the variants were submitted to NCBI (dbVar). esv and essv represent the same variant entities, but those that were submitted to EBI (DGVa). Please see Overview of Structural Variation for more information.