PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 25953684-2 2015 This expanded repeat, also known as the rare fragile site FRAXA, causes X chromosome fragility in cultured cells from patients but only when induced by perturbing pyrimidine synthesis. pyrimidine 163-173 fragile site, folic acid type, rare, fra(X)(q27.3) A (macroorchidism, mental retardation) Homo sapiens 58-63