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 northern hemisphere westerlies between 30Â° and 60Â° North drive the North Pacific Current and the North Atlantic Current. 2. The northeast trade winds, which blow from the northeast towards the equator at between 0Â° and 30Â° North, drive the North Equatorial Currents in the Atlantic, Pacific and Indian Oceans. 3.