these results indicate that ( a ) sulfated glycoconjugates turn over rapidly in the tracheal epithelium and may account for much sulfated material spontaneously released into organ culture medium and into the tracheal lumen , and ( b ) 4 h after na2 ( 35 ) so4 incubation , the major source of 35s-labeled macromolecules released from ferret trachea by neural agonists is the submucosal glands .
C1179002
tracheal epithelium
C0040578
trachea