WholeIgGantibodiesareisolatedasintactmoleculesfromantiserabyimmunoaffinitychromatography.TheyhaveanFcportionandtwoantigenbindingFabportionsjoinedtogetherbydisulfidebondsandthereforetheyaredivalent.Theaveragemolecularweightisreportedtobeabout160kDa.ThewholeIgGformofantibodiesissuitableforthemajorityofimmunodetectionproceduresandisthemostcosteffective.
Alkalinephosphatase(fromcalfintestine)conjugatesarepreparedbyamodifiedmethodofAvremeasetal.,Scand.J.Immunol.1978.8(Supple.7),7.Resultingconjugatescontainheterogeneous,highmolecularweightcomplexes.Theyaresensitivereagentsforsolid-phaseimmunoassayssuchasELISAandWesternblotting.Althoughalkalinephosphataseconjugatesaresometimesusedforimmunohistochemistry,penetrationintowholemounttissuesmaybelimitedbytheirlargesizes.