Mapping of the pulmonary surfactant SP5 (SFTP2) locus to 8p21 and characterization of a microsatellite repeat marker that shows frequent loss of heterozygosity in human carcinomas.

We have identified 4 cosmids at the SFTP2 locus by cDNA hybridization. SFTP2 was mapped using a polymorphic CA repeat and localized to 8p21 by FISH. Allele loss in carcinomas was detected using this PCR marker. Among 11 lung and colon tumors, 6 of 9 informative cases exhibited allelic loss.