From: Sequence determinants of human microsatellite variability
 | Regular | Irregular |
---|---|---|
Number of loci | 390 | 237 |
One STR region | 302 | 186 |
Di | 25 | 5 |
Tri | 94 | 39 |
Tetra | 183 | 142 |
Two separate STR regions | 76 | 46 |
Di | 8 | 2 |
Tri | 10 | 5 |
Tetra | 58 | 39 |
Three separate STR regions | 12 | 5 |
Di | 3 | 0 |
Tri | 1 | 1 |
Tetra | 8 | 4 |