Retrovirus definition, any of a family of single-stranded RNA viruses having a helical envelope and containing an enzyme that allows for a reversal of genetic transcription, from RNA to DNA rather than the usual DNA to RNA, the newly transcribed viral DNA being incorporated into the host cell's DNA strand for the production of new RNA retroviruses: the family includes the AIDS virus. Retrovirus: 1 n any of a group of viruses that contain two single-strand linear RNA molecules per virion and reverse transcriptase (RNA to DNA); the virus transcribes its RNA into a cDNA provirus that is then incorporated into the host cell Types: HTLV-1, human T-cell leukemia virus-1 retrovirus causing T-cell leukemia HIV, human. Call of mini zombies 2 cheats.
Retrovirus
A family of viruses distinguished by three characteristics: (1) genetic information in ribonucleic acid (RNA); (2) virions possess the enzyme reverse transcriptase; and (3) virion morphology consists of two proteinaceous structures, a dense core and an envelope that surrounds the core. Some viruses outside the retrovirus family have some of these characteristics, but none has all three. Numerous retroviruses have been described; they are found in all families of vertebrates. SeeAnimal virus, Reverse transcriptase, Ribonucleic acid (RNA)
The genome is composed of two identical molecules of single-stranded RNA, which are similar in structure and function to cellular messenger RNA. Deoxyribonucleic acid (DNA) is not present in the virions of retroviruses. The reverse transcriptase in each virus makes a DNA copy of the RNA genome shortly after entry of the virus into the host cell. The discovery of this enzyme changed thinking in biology. Previously, the only known direction for the flow of genetic information was from DNA to RNA, yet retroviruses make DNA copies of their genome by using an RNA template. This reversal of genetic information was considered backward and hence the family name retrovirus, meaning backward virus.
Once the DNA copy of the RNA genome is made, it is inserted directly into one of the chromosomes of the host cell. This results in new genetic information being acquired by the host species. The study of reverse transcriptase has led to other discoveries of how retroviruses add a variety of new genetic information into the host. One such class of genes carried by retroviruses is oncogenes, meaning tumor genes. Retroviral oncogenes appear to be responsible for tumors in animals. SeeOncogenes, Virus classification
Battleheart Legacy is an action RPG developed by Mika Mobile, Inc. And released on May 28, 2014. It is the sequel to the 2011 game Battleheart. Critical reception edit. Battleheart Legacy. Developer Mika Mobile. Publisher Mika Mobile. Release Date May 28, 2014. Platforms iPhone. Battle Heart Legacy Wiki Guide. Table of Contents. Battleheart Legacy offers a wide Variety of Classes, which is based around your play style. While your character does not have a set class, Class progression is based primarily upon your Stats,. Battleheart is a role-playing video game developed by Mika Mobile and released on February 1, 2011 for iOS. A sequel, Battleheart Legacy, was released in 2014. Critical reception. Welcome to the Battleheart Legacy Wiki This is a fan-made wiki dedicated to Battleheart Legacy, the touch-friendly open world action RPG by Mika Mobile. Read the significant reviews for Battleheart Legacy here: Reviews for Battleheart Legacy. Feel free to contribute! Battleheart legacy wiki online.
Two distinct retroviruses have been discovered in humans. One is human T-cell lymphotropic virus type 1 (HTLV-1), a type C-like virus associated with adult T-cell leukemia. The other is the human acquired immune deficiency syndrome (AIDS) virus, a type E lentivirus. SeeAcquired immune deficiency syndrome (AIDS)