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.
Tungsten particles of the indicated sizes were coated with plasmid DNA and shot at plated A. coffeaeformis cells using a helium pulse of 1550 psi (black bars) or 2000 psi (grey bars). Transformed clones were quantified by counting the number of colonies that grew on agar plates containing the antibiotic nourseothricin.
