noun, plural: transmembrane proteins
Transmembrane proteins may be classified in two major groups:
- Alpha-helix - present in all types of biological membranes.
- Beta barrel - present in outer membranes of Gram-negative bacteria, cell wall of Gram-positive bacteria, outer membranes of mitochondria and chloroplasts.
Word origin: L, comb. form of trāns (adv. and prep.) across, beyond, through + -membrane.
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