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.
Full Definition of OSCILLATION. 1. : the action or state of oscillating. 2. : variation, fluctuation. 3. : a flow of electricity changing periodically from a maximum to a minimum; especially: a flow periodically changing direction.4. : a single swing (as of an oscillating body) from one extreme limit to the other.ull Definition of OSCILLATION. 1. : the action or state of oscillating. 2. : variation, fluctuation. 3. : a flow of electricity changing periodically from a maximum to a minimum; especially: a flow periodically changing direction. 4.