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.
It is a phase of 'El NinoâNiÃ±o Southern' (OSCILLATION), enso which refers to variations in the temperature of the surface of the tropical Eastern Pacific ocean and in air surface pressure in the tropical Western. Pacific the warm oceanic, Phase El, nino niÃ±o accompanies high air surface pressure in The. western pacific