Working with 7E11-C5 from 1993 to 1995, Warren Heston and William Fair of the Memorial Sloan Kettering Cancer Center (MSKCC) cloned the PSMA gene, described PSMA as folate hydrolase highly expressed in prostate cancer, and further detailed its tissue distribution and mapped its genomic organization on chromosome 11p11-12 [2,3,4,5,6,7]. Here, FOLH1 is linked to prostate cancer.