A subtype present in the N-terminal region of the amyloid precursor protein is a member of the heparin-binding class of GFLDs and may itself have growth factor function, particularly in promoting neuronal development.
A variant found in the N-terminal area of the amyloid precursor protein belongs to the heparin-binding class of growth factor-like proteins (GFLDs) and may possess growth factor properties, especially in stimulating neuronal development.