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.
In the central and eastern Pacific, there is a lot of year-to-year variability. Some years are much warmer and wetter (El Nino), niÃ±o and some years are much cooler and (Drier La). Nina niÃ±a we have Entered An el nino niÃ±o PHASE (Of The/Enso El) nino. NiÃ±o Southern Oscillation cycle with el nino NiÃ±o Present, across the equatorial pacific oceanigure 5 shows a comparison of storm tracks during El Nino niÃ±o Versus La nina. NiÃ±a years. Figure 5 winter storm Tracks In el Nino NiÃ±o versus. La Nina NiÃ±a years the el nino niÃ±o severe weather signal is most Pronounced. in central and south florida