| Catalog ID | Description | Sex | Age | Race | Affected | Family Member | Relationship to Proband | Cell Type | Family |
| GM27407 | MENTAL RETARDATION, AUTOSOMAL DOMINANT 40; MRD40
| Male | 33 YR | White | No | 3 | father | Fibroblast | 3438 |
| GM27408 | MENTAL RETARDATION, AUTOSOMAL DOMINANT 40; MRD40
| Male | 4 YR | White | Yes | 1 | proband | Fibroblast | 3438 |
| GM27409 | MENTAL RETARDATION, AUTOSOMAL DOMINANT 40; MRD40
| Female | 30 YR | White | No | 2 | mother | Fibroblast | 3438 |
| GM27458 | MENTAL RETARDATION, AUTOSOMAL DOMINANT 40; MRD40
| Male | 4 YR | White | Yes | 1 | proband | B-Lymphocyte | 3438 |
| GM27459 | MENTAL RETARDATION, AUTOSOMAL DOMINANT 40; MRD40
| Female | 30 YR | White | No | 2 | mother | B-Lymphocyte | 3438 |
| GM27460 | MENTAL RETARDATION, AUTOSOMAL DOMINANT 40; MRD40
| Male | 33 YR | White | No | 3 | father | B-Lymphocyte | 3438 |
| GM27978 | MENTAL RETARDATION, AUTOSOMAL DOMINANT 40; MRD40
| Male | 4 YR | White | Yes | 1 | proband | Stem cell | 3438 |