The building blocks of English

Affixes

glut-

Gluten.

From Latin gluten, glue.

Gluten is a sticky nitrogenous protein material present in wheat flour. Words beginning in glut‑ refer to related chemical compounds, such as the amino acids glutamine and glutamic acid; salts of the latter are glutamates, as in the taste enhancing food additive monosodium glutamate; glutaminase is an enzyme that breaks down glutamine to glutamic acid.