However, as different lines of research converged, it became clear that some of the same signaling proteins which the hematopoietic and immune systems use were also being used by all sorts of other cells and tissues, during development and in the mature organism.
Međutim, kako su vremenom različite linije istraživanje konvergirale, postalo je jasno da su neki od tih istih signalnih proteina hematopoetskog i imunskog sistema tako]e korišćeni od strane niza drugih ćelija i tkiva, tokom razvoja i u odraslom organizmu.