 Antibodies are protein components of an adaptive immune system whose main function is to bind antigens , or foreign substances in the body , and target them for destruction . Antibodies can be secreted into the extracellular environment or anchored in the membranes of specialized B cells known as plasma cells . Whereas enzymes are limited in their binding affinity for their substrates by the necessity of conducting their reaction , antibodies have no such constraints . An antibody 's binding affinity to its target is extraordinarily high . 
 Antibodies <a href='drop_aux' title='1'><mark>are</mark></a>protein components of an adaptive immune system whose main function is to bind antigens , or foreign substances in the body , and target them for destruction . Antibodies can be secreted into the extracellular environment or anchored in the membranes of specialized B cells known as plasma cells . Whereas enzymes are limited in their binding affinity for their substrates by the necessity of conducting their reaction , antibodies <a href='got' title='2'><mark>have</mark></a> no such constraints . An antibody <a href='null_genetive' title='3'><mark>'s</mark></a>binding affinity to its target <a href='drop_aux' title='4'><mark>is</mark></a>extraordinarily high . 
Antibodies protein components of an adaptive immune system whose main function is to bind antigens , or foreign substances in the body , and finishline em for destruction . Antibodies can be secreted into the extracellular environment or anchored in da membranes of specialized B cells known as plasma cells . Whereas enzymes are limited in their binding affinity for their substrates by the necessity of conducting their reaction , antibodies got no such constraints . An antibody  binding affinity to finishlinerget extraordinarily high .