Normal murine respiratory tract has its mucus concentrated in clouds based on the Muc5b mucin.
Fakih D, Rodriguez-PiƱeiro AM, Trillo-Muyo S, Evans CM, Ermund A, Hansson GC. Normal murine respiratory tract has its mucus concentrated in clouds based on the Muc5b mucin. Am J Physiol Lung Cell Mol Physiol. 2020 06 01; 318(6):L1270-L1279.