helper virus
21defective virus — A virus genetically deficient in replication, but that may nevertheless be replicated when it co infects a host cell in the presence of a wild type helper virus. Most acute transforming retroviruses are defective, since their acquisition of… …
22Friend spleen focus-forming virus — Defective virus found in certain strains of Friend helper virus, detected by its ability to form foci in spleens of mice, and believed to be responsible in those strains for the production of a leukaemia associated with polycythemia rather than… …
23Rous-associated virus — (RAV) a helper virus in whose presence a defective Rous sarcoma virus is able to form a protein coat …
24satellite virus — a strain of virus that cannot replicate except in the presence of helper virus; considered to be deficient in coding for capsid formation …
25T helper cell — T helper cells (also known as effector T cells or Th cells) are a sub group of lymphocytes (a type of white blood cell or leukocyte) that plays an important role in establishing and maximizing the capabilities of the immune system. These cells… …
26Lily-Mild-Mottle-Virus — Lily Mottle Virus Systematik Reich: Viren Ordnung: nicht klassifiziert Familie: Potyviridae Gattung: Potyvirus Art …
27Tulip-band-breaking-Virus — Lily Mottle Virus Systematik Reich: Viren Ordnung: nicht klassifiziert Familie: Potyviridae Gattung: Potyvirus Art …
28Lily-Mottle-Virus — Systematik Reich: Viren Ordnung: nicht klassifiziert Familie: Potyviridae Gattung: Potyvirus Art …
29Plant virus — Plant viruses are viruses affecting plants.Plant viruses, like all other viruses, are obligate intracellular parasites that do not have the molecular machinery to replicate without the host. The plant viruses are defined as viruses pathogenic to… …
30Influenza A virus subtype H1N1 — For the H1N1/09 virus strain responsible for the 2009 flu pandemic, see Pandemic H1N1/09 virus. For the 2009 pandemic of Influenza A(H1N1), see 2009 flu pandemic. For the 1918 pandemic of Influenza A(H1N1), see 1918 flu pandemic. Influenza (Flu) …
