Antibodies fight off infections and viruses.

Two types of antibodies are important.

Previous tobacco vaccines failed because they contained antibodies.

Antigens are substances capable of provoking the formation of antibodies.

For example, a common bacterial strategy is to produce proteins that bind host antibodies.

For most people, HIV antibodies reach a detectable level after two to six weeks.

Researchers wanted to combine the cancer cells rapid growth and the normal cells ability to dictate the production of a single specific monoclonal antibody.

Nationalism continues to produce powerful political antibodies to American and European meddling in other countries internal affairs.

The virus selectively infects liver cells, which then start to make a steady stream of the antibodies.

The antibodies you just saw in this video, in action, are the ones that make most vaccines work.

Phagocytes, in particular dendritic cells and macrophages, stimulate lymphocytes to produce antibodies by an important process called antigen presentation.

The method combines amplification with a novel technology called Surround Optical Fiber Immunoassay (SOFIA) and some specific antibodies against PrPSc.

A protein that is in cells, called TRIM21, can attach to the antibodies on the surface of the virus particle.

The new vaccine contains a harmless virus that has been engineered to carry the genetic information to make anti nicotine antibodies.

Antibodies can continue to be an effective defence mechanism even after viruses have managed to gain entry to the host cell.

Coughlin s National Union for Social Justice, whose membership ran into the millions, was eventually defeated by the American system s powerful democratic antibodies.

The yellow green area is the fluids of blood, which is mostly water, but it's also antibodies, sugars, hormones, that kind of thing.

But in the past few months, researchers have also isolated several new broadly neutralizing antibodies from the blood of an HIV infected individual.

Enzymes that chew things up, antibodies, it s all, you know, the fit between a protein and whatever it is grabbing, in this case a smell.

The antibodies hunt down any nicotine molecules in the bloodstream, neutralising them before they reached the brain, preventing a smoker from getting a nicotine hit.

Many animal traders tested in 2003 in a market in the epicenter of the SARS outbreak also had the antibodies again with no history of disease.

Now if you look at biology, there's many structures like DNA and antibodies and proteins and ribosomes that you've heard about that are already nano structured.

Another example is the creation of hybridomas, hybrid cells created in the laboratory by fusing normal white blood cells that produce antibodies with a cancer cell.

When the adaptive immune system of a vertebrate encounters a virus, it produces specific antibodies that bind to the virus and often render it non infectious.

Chinese researchers have detected antibodies to SARS like viruses in 2 of people from whom blood samples were taken in 2001 a year before the disease first occurred.

In the early 20th century, this controversy was resolved when it became understood that complement can act in combination with specific antibodies, or on its own in a non specific way.

In addition, these researchers found a new site on HIV where the antibodies can grab onto, and what's so special about this spot is that it changes very little as the virus mutates.

Populations of microbes fluctuate by many billions on a daily basis as they move between their host organisms and encounter antibiotics, antibodies, drought, or other natural hazards to which their genetic evolution may respond.

Memory B cells turn into plasma cells, which produce wave after wave of the specific antibodies that latch onto HIV to prevent it from infecting cells, while squadrons of killer T cells seek out and destroy cells that are already HIV infected.

This challenge has been particularly difficult because of the nature of the virus, particularly its ability to integrate itself into the genome of host cells, to readily mutate, and to conceal that part of its outer coat that would induce protective antibodies.

And what we've got is a very, very high level of virus right at the beginning when you're first infected, then you start making antibodies, and then it bumps along at quite low levels for a long time 10 or 12 years you have spikes if you get another sexually transmitted infection.