Cor1 is a component of the chromosome core in the meiotic prophase chromosomes [1]. Xlr is a lymphoid cell specific protein [2]. Xlm is abundantly transcribed in testis in a tissue-specific and developmentally regulated manner. The protein is located in the nuclei of spermatocytes, early in the prophase of the first meiotic division, and later becomes concentrated in the XY nuclear subregion where it is in particular associated with the axes of sex chromosomes [3].

1: Synaptonemal complex proteins: occurrence, epitope mapping and chromosome disjunction. Dobson MJ, Pearlman RE, Karaiskakis A, Spyropoulos B, Moens PB; J Cell Sci 1994;107:2749-2760. PMID:7876343

2: Sequence and expression of murine cDNAs encoding Xlr3a and Xlr3b, defining a new X-linked lymphocyte-regulated Xlr gene subfamily. Bergsagel PL, Timblin CR, Kozak CA, Kuehl WM; Gene 1994;150:345-350. PMID:7821804

3: The meiosis-specific Xmr gene product is homologous to the lymphocyte Xlr protein and is a component of the XY body. Calenda A, Allenet B, Escalier D, Bach JF, Garchon HJ; EMBO J 1994;13:100-109. PMID:8306953