Reverse transcriptases are enzymes encoded in retroviruses viral genome. The enzyme is responsible for transcription of the viral RNA to produce a dsDNA that can be inserted into the host genome.
Pacific Ocean Basin. The Pacific Ocean is bounded on the east by the North and South American continents; on the north by the Bering Strait; on the west by Asia, the Malay Archipelago, and Australia; and on the south by the Southern Ocean.
What is the Great Basin? The Great Basin covers most of Nevada and parts of Utah, Oregon, Idaho and California. Generally, its east boundary is the Wasatch Mountains of Utah and the western edge is formed by the Sierra Nevada and Cascade Mountains that create a rain shadow over much of the Great Basin, preventing many Pacific storms from reaching the region.