31. The discovery was announced at the Fifth Conference on Retroviruses and Opportunistic Infections. 32. Saba said at the Sixth Conference on Retroviruses here. 33. He presented the results at the 6th Conference on Retroviruses and Opportunistic Infections. 34. There are three different replication systems during the life cycle of a retrovirus . 35. [Note : Retroviruses can also be considered TEs. 36. Since zalcitabine is a reverse transcriptase inhibitor it possesses activity only against retroviruses . 37. A well-studied family of this class of viruses include the retroviruses . 38. The third technique focuses on carrying DNA into the embryo by using retroviruses . 39. Retroviruses present in animal genomes could harm transplant recipients.40. Human endogenous retroviruses were discovered by accident using a couple of different experiments.
