Tamm-Horsfall protein and erythrocyte ghosts immunologically cross-react.

Antisera were raised in the rabbit against human Tamm-Horsfall protein (THP) and erythrocyte ghosts. They were purified and exhausted with serumalbumin. Using a radioimmunoassay, antisera against THP allowed to detect in erythrocyte ghosts 41 ng of a reaction material per mg membrane protein. Ouchterlony double diffusion technique showed a similar corss-reaction and, conversely, a cross-reaction between THP and antisera to erythrocyte ghosts. These data support the view that red cell membrane contains a compound related to THP.