Function:Mediates cellular binding of particles and immune complexes that have activated complement. ,miscellaneous:This is the sequence of the F allotype of CR1. ,online information:Blood group antigen gene mutation database ,polymorphism:CR1 contains a system of antigens called the Knops blood group system. Polymorphisms within this system are involved in malarial rosetting , a process associated with cerebral malaria , the major cause of mortality in Plasmodium falciparum malaria. Common Knops system antigens include McCoy (McC) and Sl (a) /Vil (Kn4 , or Swain-Langley; Vil or Villien) . Sl (a-) phenotype is more common in persons of African descent and may protect against fatal malaria. ,similarity:Belongs to the receptors of complement activation (RCA) family. ,similarity:Contains 30 Sushi (CCP/SCR) domains. ,subunit:Monomer. ,tissue specificity:Present on erythrocytes , leukocytes , glomerular podocytes , and splenic follicular dendritic cells. ,
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