As nouns the difference between fibril and protofibril
is that fibril is a fine fibre or filament while protofibril is an elongated cluster of cells that grows into a fibril.
fibril
English
Noun
(
en noun)
A fine fibre or filament
(biology) Any fine, filamentous structure in animals or plants
Derived terms
* fibrillar
* interfibrillar
protofibril
English
Noun
(
en noun)
(anatomy) An elongated cluster of cells that grows into a fibril