@article {128,
	title = {Cell recognition by mucus secreted by urn cell of <i>Sipunculus nudus</i>},
	journal = {Nature},
	volume = {253},
	year = {1975},
	note = {@ URN CELLS OF S. NUDUS SECRETE MUCUS THAT IS STICKY FOR FOREIGN CELLS BUT NOT FOR AUTOLOGOUS CELLS. TRIED TO ALTER AUTOLOGOUS ERYTHROCYTES TO MAKE THEM {\textquoteright}FOREIGN{\textquoteright} TO URN MUCUS. URN CELLS ARE BICELLULAR ORGANELLES ABOUT 20UM IN DIAM, W VESICULAR ANTERIOR CELL AND A LOOSELY ATTACHED CILIATED MUCUS-SECRETORY CELL (FIG.1). LATTER ORIGINATES IN EPITHEL. LINING OF COELOM, DETACH \& SWIM PICKING UP FOREIGN W NORMAL STICKY TAILS. CAN PRODUCE LONG TAILS IF INVASION OF FOREIGN STUFF.},
	pages = {634-635},
	keywords = {mucus, s. nudus, urn cells},
	author = {Bang, F. B. and Bang, B. G.}
}
