This entry represents an N-terminal Fn3-like domain found at the N-terminus of purple acid phosphatase enzymes [1].

1: The structure of a purple acid phosphatase involved in plant growth and pathogen defence exhibits a novel immunoglobulin-like fold. Antonyuk SV, Olczak M, Olczak T, Ciuraszkiewicz J, Strange RW; IUCrJ. 2014;1:101-109. PMID:25075326