Calendar '25: suppl. info: mAB

The image shows a molecular model of an antibody (AB).
ABs are shaped as a Y  (inset).

mAB_molecule_w500_70dpi_plus_Y.png

and often represented just as a    AB_verticalY.png

The two antigen binding-sites are on top.

The activation mechanism of B lymphocytes
was first proposed by Paul Ehrlich in 1893.
This original image drawn by Ehrlich comes
surprisingly close to the molecular mechanism:

PE_intuition_BcellActivation.png