ORF2 is a gene that encodes a protein involved in the replication of certain viruses, particularly in the context of retrotransposons and retroviruses. It plays a crucial role in the life cycle of these elements by facilitating the integration of their genetic material into the host genome. In addition to its role in viral replication, ORF2 is also studied for its potential implications in gene therapy and genetic engineering. Understanding how ORF2 functions can help researchers develop new strategies for combating viral infections and manipulating genetic sequences for therapeutic purposes.