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.
Variable targeting of virus clusters. Box plot of protospacers per base pair of viral sequence for each virus cluster. The center line of the box represents the median; the upper and lower lines mark the first and third quartiles, respectively. Whiskers extend to 1.5× the interquartile range; outliers are shown as black dots.
