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 called the Pacific Standard Time (PST) in winter and the Pacific Daylight Time (PDT) in summer. Pacific Standard Time (PST) is eight hours behind the Coordinated Universal Time (UTC-8). In the United States of America, it is used during winter in California, Idaho, Nevada, Oregon, and Washington. It is also being used in the Canadian province of British Columbia except Cranbrook, Golden, and Invermere.