Sperm have no surface antigens



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Clearly, several antigens of gametogenic origin have been successfully applied to induce infertility in experimental animals. Development, maintenance, and modulation of patterned membrane topography: Abstract Antisperm antibodies ASA are the main cause of immunological infertility, as they impair sperm function by binding to the sperm membrane. Dynamics, ultrastructure and gene expression of human in-vitro organized testis cells from testicular sperm extraction biopsies. Abstract Sperm-egg plasma membrane fusion during fertilization was studied using guinea pig gametes and mAbs to sperm surface antigens. The inhibition was dose-dependent stronger inhibition in higher concentrations and occurred only when the hemizonae were incubated with the peptides prior to sperm.
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Why does a sperm doesn't act as foreign to induce immune response?


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Polymerase chain reaction - Wikipedia


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Polymerase chain reaction

They remove waste products and extra water, which become urine. Antibodies 'attack' pathogens or toxins they produce by binding to antigens e. Other symptoms may include: Rock made of banded domes of sediment in which are found the most ancient forms of life:
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