By endocytosis or phagocytosis, exogenous antigens are taken into the antigen-presenting cells ( APCs ) and processed into fragments.

Modern IFVs are well-armed infantry carriers, differencing from earlier APCs by their heavier armament allowing them to give direct-fire support during an assault.

They are often used as APCs because of their carrying ability and heavy protection.

It is believed that the seized vehicles ( which included 15 Belgian Army Pandur APCs leased to Beninise army troops ) and parts have been used to equip the Military of Equatorial Guinea, and such seizure are considered by some as an act of piracy.

IFVs are similar to armoured personnel carriers ( APCs ), designed to transport a section or squad of infantry ( generally between five and ten men ) and their equipment.

They are differentiated from APCs — which are purely transport vehicles, armed only for self defence — because they are designed to give direct fire support to the dismounted infantry and so usually have significantly enhanced armament.

Mechanized infantry are infantry equipped with armored personnel carriers ( APCs ) or infantry fighting vehicles ( IFVs ) for transport and combat ( see also mechanized force ).

Most APCs and IFVs are fully tracked, or are all-wheel drive vehicles ( 6 × 6 or 8 × 8 ), for mobility across rough ground.

A recent trend seen in the Israel Defense Forces, the Armed Forces of the Russian Federation is the development and introduction of exceptionally well-armored APCs ( HAPC ) such as the IDF Achzarit which are converted from obsolete Main Battle Tanks ( such as the Russian T-55 ).

Many APCs and IFVs currently under development are intended for rapid deployment by aircraft.

RPGs are very effective against armored vehicles such as armored personnel carriers ( APCs ).

Nevertheless they are often surprisingly effective ; ceramic upgrades to Canadian M-113s were carried out in the 1990s, after it was realized that it would offer more protection than newly built APCs like the M2 Bradley.

Helper T cells become activated when they are presented with peptide antigens by MHC class II molecules, which are expressed on the surface of antigen presenting cells ( APCs ).

The principal functions of B-cells are to make antibodies against antigens, to perform the role of antigen-presenting cells ( APCs ), and to develop into memory B cells after activation by antigen interaction.

Class II MHC proteins are generally only found on the surface of specialised antigen-presenting cells ( APCs ).

Some APCs also bind native ( or unprocessed ) antigens to their surface, such as follicular dendritic cells, but unprocessed antigens do not interact with T cells and are not involved in their activation.

At the present time, infantry in the Finnish Army are designated either as infantry or Jäger troops, specifically mechanized infantry or motorised infantry using APCs or vehicles such as Sisu Nasu.

Including prototypes and export versions there are over a hundred variants including self-propelled gun, anti-aircraft systems, APCs, and ATGM versions.

** XA-203, the last generation APC replacing the oldest vehicles of the XA-185 series, except for regular APCs and ambulances, there are also the following versions:

Dendritic cells ( DCs ), which are the primary antigen-presenting cells ( APCs ), of the donor tissue migrate to the recipient's peripheral lymphoid tissue ( lymphoid follicles and lymph nodes ), and present the donor's self peptides to the recipient's lymphocytes ( immune cells residing in lymphoid tissues ).

There are 50 different land, air, and sea vehicles, including helicopters, tanks, boats and APCs along with a few vehicles and weapons which cannot be used directly, but which can be called on in a support role, such as fighter jets and artillery.

Platforms used include both trucks and heavier combat vehicles such as APCs and tanks, which add protection from aircraft, artillery, and small arms fire for front line deployment.

Platforms used include both trucks and heavier combat vehicles such as APCs and tanks, which add protection from aircraft, artillery, and small arms fire for front line deployment.

The earliest armored personnel carriers ( APCs ) produced by Brazil, in the 1960s, benefited directly from some of the technology developed by Brazil's dynamic automotive industry.

Composed of 3, 000 men hand-picked from Gaddafi's tribal group in the Sirte region, the Guard was well armed, being provided with T-54 and T-62 tanks, APCs, MRLs, SA-8 and ZSU-23-4 SAMs taken from the army inventory.

Thereafter, the Soviets were only allowed to cross via the Sandkrug Bridge crossing ( which was the nearest to Tiergarten ) and were prohibited from bringing APCs.

During an immune response, professional antigen-presenting cells ( APCs ) endocytose foreign material ( typically bacteria or viruses ), which undergoes processing, then travel from the infection site to the lymph nodes.

The Staffords comprised 45 Warrior APCs, with a company from the Grenadier Guards and the 1st Battalion, The Prince of Wales's Own Regiment of Yorkshire being attached to the regiment.

Apart from a mere ten M2 Half Track Cars, the Guardia suffered from a chronic shortage of light armoured personnel carriers ( APCs ) for its infantry units, forcing them to rely on their extensive fleet of transport and liaison vehicles.

In June 1969, an infantry company from 5 RAR, then on its second tour, and supported by a troop of tanks and a troop of APCs fought a significant combined-arms action against a battalion-sized force of NVA regulars and VC local force troops at the Battle of Binh Ba.

Meanwhile, A Company was dispatched mounted in M113 armoured personnel carriers ( APCs ) from 3 Troop, 1st APC Squadron.

Whereas the Americans relied on massed firepower and mobility in big-unit search and destroy operations as part of a war of attrition which often resulted in heavy casualties on both sides, in contrast, Australian doctrine — although not eschewing conventional operations — emphasised deliberate patrolling utilising dispersed companies supported by artillery, APCs and helicopters to separate the Viet Cong from the population in the villages, while slowly extending government control.

In support were two companies from 6 RAR as well as APCs, engineers and artillery.

Meanwhile, at Nui Dat Roberts arrived at the 6 RAR headquarters with his troop of ten APCs at 17: 05, and was quickly briefed by the Operations Officer on the situation before departing to pick up A Company from their lines.

However, as the fighting continued it further delayed the advance of the relief force, and with Roberts concerned the presence of the infantry forward of his vehicles would prevent the APCs from employing their heavy weapons, he called to Mollison to order 2 Platoon to return to the carriers.

Following a number of uncoordinated manoeuvres by the APCs, Townsend took command and with the light failing, he ordered Roberts to assault from the west into the flank of the main Viet Cong force.

Around the perimeter the Australians engaged the withdrawing Viet Cong with their rifles and machine-guns, while the APCs moved into a line from north to south on the eastern side of the company position.

The key reasons for D Company's success included their superior radio communications which had allowed Stanley to co-ordinate the fires of the guns at Nui Dat, the firepower of the artillery itself which had repeatedly broken up the assaulting Viet Cong formations, the resupply of D Company by helicopter which had prevented them from running out of ammunition, and the firepower and mobility of the APCs in the relief force which finally broke the Viet Cong's will to fight.

At its height in the late 1970s, the Al-Marada mustered some 3, 500 men and women equipped with small-arms drawn from LAF reserves and ISF police stations or supplied by Syria, backed by a small armoured corps made of ex-Lebanese Army M113 APCs and gun-trucks, the latter being commandeered Land-Rover, GMC and Toyota Land Cruiser pickups fitted with heavy machine guns, recoilless rifles and anti-aircraft autocannons.

Initially, wheeled APCs ( e. g. the BTR-152 ) were used, some of which lacked overhead protection and were therefore vulnerable to artillery fire.

During the South African Border War, the Soviet RPGs used by SWAPO guerilllas and their Angolan supporters posed a serious threat to South Africa's lightly armored APCs, which could be easily targeted as soon as they stopped to disembark troops.

RPGs were used with great effect in the famous Battle of Vukovar by the Croatian army, during which more than 300 tanks, APCs and vehicles were put out of action.

Centurions modified as APCs were used in Gaza, the West Bank and the Lebanese border.

As of now BMD-1 and vehicles based on it are used by the following units of Russian Army or are stationed in following bases ( this list does not include BTR-D APCs and BTR-D variants ):

Even today, original Gundlach periscopes are used in some tanks and APCs.

It is most commonly used on APCs and armoured cars.

Baktar-Shikan is also mounted on Pakistani armoured personnel carriers ( APCs ) and a modified air-launched variant is used to arm the AH-1 Cobra helicopter gunships and other helicopters of the Pakistan Army Aviation wing.

The M20 was primarily used as a command vehicle and for forward reconnaissance, but many vehicles also served as APCs and cargo carriers.

ARVs are usually built on the basis of a vehicle in the same class as they are supposed to recover ; a tank-based ARV is used to recover tanks, while an APC-based one recovers APCs, but does not have the power to tow a much heavier tank.