May play a role in the formation of the protective mucosal protein pellicle involved in the reinforcement and protection of oral mucosal epithelial surface. Found in saliva (at protein level). Secreted from the submandibular gland. By isoprenaline. Prolongend stimulation does not change the percentages of secreted forms (with gliadoralin A 1-90 as predominant form). Predominantly proteolytically processed at its C-terminus before secretion to produce the major form gliadoralin A 1-90. Further proteloytically processed after secretion to produce minor forms. Potential substrate of transglutaminase.