The dividing wall that runs down the middle of the nose, creating two nasal passages, each ending in a nostril.
- Septum, ventricular
The wall between the two lower chambers (ventricles) of the heart. Also known as interventricular septum.
- Sequence tagged site (STS)
A short (200 to 500 base pair) DNA sequence that occurs but once in the genome and whose location and base sequence are known. STSs are detectable by polymerase chain reaction (PCR), are useful for localizing and orienting the mapping and sequence data, and serve as landmarks on the physical map of a genome. Expressed […]
- Sequence, complementary
Nucleic acid sequence of bases that can form a double- stranded structure by matching base pairs. For example, the complementary sequence to C-A-T-G (where each letter stands for one of the bases in DNA) is G-T-A-C.
- Sequence, conserved
A base sequence in a DNA molecule (or an amino acid sequence in a protein) that has remained essentially unchanged throughout evolution.
- Sequence, draft DNA
Sequence of a DNA with less accuracy than a finished sequence. In a draft sequence, some segments are missing or are in the wrong order or are oriented incorrectly. A draft sequence is as opposed to a finished DNA sequence.