- syvorotohnye or Ig, possessing ability to speifi interation with gomologihnymi Ag and gaptenami. The basi produers are plasmati ells, to- are formed as a result gumoralnogo the immune answer on gomologihnyj Ag. The moleule monomeasure Ig onsists of two heavy (N-ontain nearby aminokislotnyh the rests) and two lungs (L - ontain nearby aminokislotnyh the rests) polipeptidnyh the iruits onneted among themselves disulfidnymi by bridges. Inside of iruits exist additional disulfidnye ommuniations, due to to- the loops forming globuljarnye domains are formed. N-trailer sites of heavy and easy iruits are various and refer to variabelnymi ( V), other sites are rather onstant, they an be divided into the limited number domenov-it onstant sites (. In the funtional attitude in moleule At alloate: ) the ative enter, or pair- (see), Responsible for ommuniation with Ag, loated in variabelnoj areas (Fab-fragment), at monomeasure Ig-suh two sites ) a onstant site (a F-fragment), responsible for seondary biol. Funtions, napr., interation with reeptors immunokompetentnyh ells. Depending on a variety antigeni a determinant of heavy and easy iruits Ig distinguish: ) izotipy - determinants of onstant areas of the heavy and easy iruits, defining speifi speifiity At ) allotipy, aused by existene the determinant is sarlet- forms intraspeifi ) idiotiny - define speifi features, harateristi for everyone At, are loalized in variabelnoj areas At. At differ on lasses (see immuno- lasses), on proishozhdeniju-on auto-, gomo-, izo- and geterologihnye on genezu-on normal and immune on temperature optimumu-on holodovye, thermal and bitermiheskie by result vzaimodejstvija-on aggljutininy (see), pretsipitiny (see), antitoxins (see), liziny (see), opsoniny (see), tsitotoksiheskie and tsitofilnye. the Most important funtions At (together with komplementom or without it): linkage Ag and their neutralization opsoni- alien partiles neutralization of viruses, toxins, enzymes lizis or inaktivatsija bateria, mushrooms, the elementary, alien and own -hanged ells stimulation fagotsitoza.