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.
Cell densities of group I and II archaea determined by polyribonucleotide probe hybridization (Hyb) and FISH, compared to the percentage of rRNA from each group in the same sample estimated by quantitative oligonucleotide probe hybridization. Methods are described in the text.
