Many diseases are related to variations in the genetically specified structure
of proteins synthesized by cells. Genetic engineering is now able to identify the
structural variations and to introduce new genes to synthesize more healthful proteins,
but it is difficult actually to identify the specific protein or chemical variants
in bodily fluids and extracts of tissues in order to diagnose diseases and to assess
the effects of treatment. This invention provides apparatuses and methods which
allow a user to finely discriminate between small variations in the structure,
function and levels of specific biochemicals even when admixed with other biochemicals.