Somatic Cell Hybrid Mapping on Chromosome 21p
| Locus | Clone | WAV17 | AHVI-17 | JC-6A | ACEM2-10d | 153-E7b | R2-10W | 2FUr1 | Region |
| A D21S190 | PVC1.21c | + | + | + | + | + | + | + | 21q11.1 |
| D21S286 | G51E07 | + | + | + | + | + | + | + | 21q11.1 |
| D21S381 | E341 | + | + | + | + | + | + | − | 21cen |
| D21Z1 | L1.26 | + | + | + | + | + | + | − | 21cen |
| — | ABM-C61 | + | + | + | + | + | + | − | 21cen |
| D21S275 | G51G19 | + | + | + | + | + | + | − | 21cen |
| D21S237 | PPW265D | + | + | + | + | + | + | − | 21cen |
| — | Hmc01a06 | + | + | + | − | + | + | − | 21cen |
| — | ABM-C62D | + | + | + | − | + | + | − | 21cen |
| D21Z4 | PTRA-4 | + | + | + | + | + | + | − | 21cen |
| D21Z3 | PTRA-1 | + | + | + | + | + | + | − | 21cen |
| — | ABM-C78 | + | + | + | + | + | − | − | 21cen |
| D21S5 | PPW235D | + | + | + | + | + | − | − | 21p11.1 |
| D21S187 | PVC10a | + | + | + | + | + | − | − | 21p11.1 |
| D21S1276 | PLSB77 | + | + | + | + | + | − | − | 21p11.1 |
| D21S188 | PVC1.12c | + | + | + | + | − | − | − | 21p11.1 |
| D21S191 | PVC1.23c | + | + | + | + | − | − | − | 21p11.2–p12 |
| D21S411 | ABM-C74 | + | + | + | + | − | − | − | 21p11.2–p12 |
| D21S1277 | PAW14a | + | + | + | + | − | − | − | 21p11.2–p12 |
| — | 3C6 | + | + | + | + | − | − | − | 21p11.2–p12 |
| D21S1278 | PAW32a | + | + | + | + | − | − | − | 21p11.2–p12 |
| — | pCHB | + | + | + | + | − | − | − | 21p11.2–p12 |
| B | 1F8R | + | + | + | + | + | + | − | 21cen |
| 5A12R | + | + | + | + | − | − | − | 21p11.2–p12 | |
| 891B10L | + | + | + | − | + | + | − | 21cen | |
| 831B6R | + | + | + | − | + | + | − | 21cen | |
| 2C9L | + | + | + | − | + | + | − | 21cen | |
| 829D2R | + | + | + | + | + | − | − | 21p11.1 | |
| 837F5L | + | + | + | + | + | − | − | 21p11.1 | |
| 2C9R | + | + | + | + | + | − | − | 21p11.1 | |
| 891B10R | + | + | + | + | + | − | − | 21p11.1 | |
| 4E9R | + | + | + | + | − | − | − | 21p11.2–p12 | |
| 2E4L | + | + | + | + | − | − | − | 21p11.2–p12 | |
| 4E9L | + | + | + | + | − | − | − | 21p11.2–p12 | |
| 1B8L | + | + | + | + | − | − | − | 21p11.2–p12 | |
| 2C2R | + | + | + | + | − | − | − | 21p11.2–p12 | |
| 5B7L | + | + | + | + | + | + | − | 21cen | |
| 2E4R | + | + | + | + | − | − | − | 21p11.2–p12 |
[i] (A) STSs, STRs, and ESTs derived from chromosome 21p or centromeric clones. (B) STSs derived from 21p YAC terminal fragments. Names ending with L and R indicate, respectively, left and right YAC end STSs. (+ or −) Positive or negative PCR amplification.