title: Use of single (4B-2) and repetitive copy (pS4) deoxyribonucleic acid (DNA) probes to characterize translocated Y DNA in a pedigree with recurrent abortion.
abstract: Probes for unique and repetitive copy deoxyribonucleic acid (DNA) are available to detect and characterize Y DNA. The probe pS4 detects repetitive copy DNA mapped to Yq12. The upper limits of the pS4 sequences are defined by the upper limits of C-banding. The probe 4B-2 is a recombinant phage construct developed from a Y library and contains a unique copy 3.3 kb Eco RI fragment mapped to Yq11. A family was ascertained through a pregnant female who had a history of four consecutive abortions and two normal daughters. Cytogenetic analysis revealed the mother and one of her daughters to have a 46,XX,15p+ karyotype. Amniocytes were karyotyped as 46,XY,15p+. Genomic DNA from controls, mother, daughters, and amniocytes was digested with Mbo I and hybridized to 32P-labeled pS4 probe. DNAs from both 46,XX,15p+ females and 46,XY,15p+ amniocytes demonstrated a clear male-specific 2.3 kb band. Digestion of the same genomic DNAs with Eco RI and blot hybridization to 32P-labeled 4B-2 probe revealed the 3.3 kb male-specific band only in the 46,XY,15p+ amniocyte DNA. The additional sequences located on 15p segregating in the female members of this family correspond to Yq12. The effect of this additional DNA on gametogenesis is unknown.
mesh_terms: D000026:Abortion, Habitual / Q000235:genetics*; D000328:Adult; D000649:Amniocentesis; D004247:DNA / Q000032:analysis*; D004262:DNA Restriction Enzymes / Q000378:metabolism; D015252:Deoxyribonucleases, Type II Site-Specific; D005260:Female; D006801:Humans; D007621:Karyotyping; D008297:Male; D010375:Pedigree; D011247:Pregnancy; D012091:Repetitive Sequences, Nucleic Acid; D014998:Y Chromosome
chemical_list: D004247:DNA; D004262:DNA Restriction Enzymes; D015252:Deoxyribonucleases, Type II Site-Specific; C024405:GATC-specific type II deoxyribonucleases