Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Multi-level index. The multi-level index provides random access to large numbers of individual base positions across a genome. Each sequence (green) is indexed by a linked-list (blue), and that index is indexed by a set of landmark nodes (red) to provide rapid access to any location.
