MHC doesn't "recognize" bacteria or anything. It's job is simply take up the broken peptides. These peptides can be originally from a virus, bacteria, or from the cell itself (self). It will take these antigen that it can bind to and bring it to the cells surface. Your adaptive immunity cells (B and T cells) job is to "see" what the MHC has to offer and identify it as self (leave alone) or as foreign (need to destroy).
MHC markers- which are proteins that present or "show" antigens like bacteria to other immune cells. Instead of being targets, they are helper proteins of the immune system.
Lymphocytes are part of the human body's innate immune system. Natural killer cells seek out and destroy foreign cells by distinguishing surface molecules of major histocompatibility complex class.
MHC = major histocompatibility complex What makes up MHC are HLA's (human leukocyte antigens), which there are subclasses for.
The immune system does not recognize the killed bacteria, and cannot recognize that the bacteria are killed, so it begins to produce antibodies for it just as it would if the bacteria were alive.
MHC Krylya Sovetov was created in 2008.
MHC IMHC I is present in all cells except red blood cells (they lack nuclei). MHC I will present an intravesicular antigen to the cells surface for it to be identified as self or foreign by your adaptive immunity cells.MHC IIMHC II is present in professional antigen presenting cells which include: macrophages, B cells and dendritic cells. These cells will engulf bacteria, soluble proteins, viruses, etc. Whatever was taken into the cell becomes processed in the increasingly acidic endosome that eventually will cut the antigen into peptides. MHC II transported from the ER will meet up with this endosome and the peptides will bind to MHC II for it to eventually present on the cells surface.
MHC I and MHC II are always expressed. The antigen it presents on a cells surface can be foreign or it can be self. It is the T cell that determines whether what the MHC is displaying is self or not. Remember antigen can be protein, lipid, sugars, etc.
germs
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All cells with a nuclei have MHC class 1.
MHC molecules are located in the short arm of chromosome 6.
Major Histocompatibility Complex