n.the cardinal number that is the sum of three and one

同義詞：four4IVquaternquaternionquaternaryquaternityquartetquadrupletfoursomeLittle Joe

Good and bad tetrads in f ( T ) gravity
Dirac equation in Riemannian space without tetrads
Telomeric DNA dimerizes by formation of guanine tetrads between hairpin loops.
Early Cretaceous tetrads, zonasulculate pollen, and Winteraceae. I. Taxonomy, morphology, and ultrastructure.
Separation of Arabidopsis pollen tetrads is regulated by QUARTET1, a pectin methylesterase gene.
NMR observation of T-tetrads in a parallel stranded DNA quadruplex formed by Saccharomyces cerevisiae telomere repeats
The thermodynamics of DNA structures that contain lesions or guanine tetrads
Assaying genome-wide recombination and centromere functions with Arabidopsis tetrads
Suppression of human immunodeficiency virus type 1 activity in vitro by oligonucleotides which form intramolecular tetrads.
Crystal structure of an RNA quadruplex containing inosine tetrad: implications for the roles of NH2 group in purine tetrads