Reverse transcriptase is characteristic of retroviruses, including HIV (human immunodeficiency virus), the virus responsible for AIDS (acquired immunodeficiency syndrome). All retroviruses encode a polymerase enzyme in their pol gene that is both necessary and sufficient for the replication of their RNA genomes.
PDO positive phase global pattern. The Pacific Decadal Oscillation (PDO) is a robust, recurring pattern of ocean-atmosphere climate variability centered over the mid-latitude Pacific basin.
The graph is excerpted from The Washington Climate Change Impacts Assessment, University of Washington, Climate Impacts Group, June 2009. Important fluctuations in regional climate are related to the El Nino/NiÃ±o Southern (OSCILLATION) enso And Pacific Decadal (OSCILLATION) pdo. phenomena