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pentamer    
五聚物

五聚物


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  • Pentamer - Wikipedia
    A pentamer is an entity composed of five subunits In chemistry, it applies to molecules made of five monomers In biochemistry, it applies to macromolecules, particularly pentameric proteins, made of five protein sub-units
  • Structure and Function of Immunoglobulins - PMC
    Upon maturation and antigenic stimulation, multimeric (usually pentameric, rarely hexameric) IgM, in which single IgM units link to each other by disulfide bonds in the CH4 region, is secreted The pentamer also contains a polypeptide chain, the J-chain, which is bound to two of the monomers by means of a disulfide bond
  • 13. 1B: Antibody Structure - Biology LibreTexts
    Two classes of antibodies are more complex IgM (see Figure \(\PageIndex{10}\)) is a pentamer, consisting of 5 "Y"-like molecules connected at their Fc portions by a "J" or joining chain
  • Immunoglobulin M (IgM) – Properties, Structure and Functions
    Immunoglobulin M is the third most common serum Ig and exists in two forms: a pentamer comprising approximately 10% of normal human serum Ig content and a membrane-bound monomer expressed on the surface of B lymphocytes for antigen recognition
  • Immunoglobulin M (IgM)- Structure and Functions - Microbe Notes
    Serum IgM exists as a pentamer and comprises approximately 10% of normal human serum Ig content It is the third most abundant human immunoglobulin It predominates in primary immune responses to most antigens and is the most efficient complement fixing immunoglobulin
  • Structural insights into immunoglobulin M | Science - AAAS
    We report a cryo–electron microscopy structure of the Fc region of human IgM in complex with the J-chain and pIgR ectodomain The IgM-Fc pentamer is formed asymmetrically, resembling a hexagon with a missing triangle The tailpieces of IgM-Fc pack into an amyloid-like structure to stabilize the pentamer
  • Cryomicroscopy reveals the structural basis for a flexible . . . - Nature
    Here, we use cryo-EM to image the structure of the human full-length IgM pentamer, revealing antigen binding domains flexibly attached to the asymmetric and rigid core formed by the Cμ4 and Cμ3
  • Structure, Function, and Therapeutic Use of IgM Antibodies
    Natural immunoglobulin M (IgM) antibodies are pentameric or hexameric macro-immunoglobulins and have been highly conserved during evolution IgMs are initially expressed during B cell ontogeny and are the first antibodies secreted following exposure to foreign antigens
  • IgM Antibodies: Structure, Properties, and Functions
    Pentameric IgM: Pentameric IgM is secreted by plasma cells Five monomer subunits are arranged with their Fc regions in the center and ten antigen-binding sites on the periphery The pentameric nature of IgM compensates relatively low affinity of IgM monomers and confers high overall avidity
  • Structure and Function of Immunoglobulin M (IgM)
    Immunoglobulin M (IgM) is a complex molecule characterized by its large size and unique structural features It is composed of five monomeric units, each resembling the basic structure of other immunoglobulins, but arranged in a distinctive pentameric formation





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