67. „Old street lamps on a seaside port promenade. Tall, slender, with wrought-iron S-curve scrolls, with spherical globes hanging above the pavement. They have stood there for decades — perhaps longer.
And yet they encode the full topology of pattern recognition receptors (PRRs) — the class of molecular guardians of innate immunity. Four constructional elements, one to one. Bracket, globe, post, base. LRR horseshoe, MD-2 with LPS, transmembrane helix, TIR domain.
The same guardian — in iron and in amino acids.”