greater extent Fab, fragments allow more exact localization of the target antigen, i.e., in staining tissue for electron microscopy. The divalency of the F(ab')2 fragment enables it to cross-link antigens, allowing use for precipitation assays, cellular aggregation via surface antigens, or rosetting assays.

Genes

The following three genes encode identical human pepsinogen A enzymes:

A fourth human gene encodes gastricsin also known as pepsinogen C:

References

External links

* The MEROPS

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