Epitope
Part of speech: noun
Definition: That part of a biomolecule (such as a protein) that is the target of an immune response
Determinant
Part of speech: noun
Definition: A determining factor; an element that determines the nature of somethingThe unique scalar function over square matrices which is distributive over matrix multiplication, multilinear in the rows and columns, and takes the value of 1 for the unit matrix. Abbreviation: detA substance that causes a cell to adopt a particular fate.