Method for isolating a target biological material, capture phase, detecting phase and reagent containing them

Capture phase for a target biological material, comprising:

• (a) an organic molecule containing at least one reactive function and (b) at least one protein material capable of recognizing or of binding, specifically and directly or indirectly, to the target biological material, said protein material containing a specific site for covalent binding to the reactive function of the organic molecule, said site comprising at least one tag comprising at least six contiguous residues selected from the group consisting of lysine and lysine-based residues.

Detection phase for a target biological material, comprising:

• (a) an organic molecule containing at least one reactive function, (b) at least one protein material capable of recognizing or of binding, specifically and directly or indirectly, to the target biological material, said protein material containing a specific site for covalent binding to the reactive function of the organic molecule, said site comprising at least one tag comprising at least six contiguous residues selected from the group consisting of lysine and lysine-based residues and (c) a detectable label.