The MarFinder algorithm was applied to a newly sequenced segment of 16p13,1
3 abutting the 3' end of the human PRM1 --> PRM2 --> TNP2 locus. A candidat
e region of matrix attached was identified. Subsequent biophysical analysis
showed that this region was attached to the somatic nuclear matrix. Nucleo
tide sequence analysis also revealed the presence of a CpG island. Data bas
e queries showed that this region contained the SOCS-1 gene. Thus, the SOCS
-1 gene is bounded by a somatic MAR and is just 3' of the spermatid-express
ed PRM1 --> PRM2 --> TNP2 domain at position 16p13.13.