TATA-binding protein (TBP) recognizes a characteristic sequence of nucleotides composed of deoxyadenosine and deoxythymidine (the TATA box) and binds to it, thus marking the starting point of transcription.
Aptamers are modified nucleotides composed of single-stranded nucleic acids that adopt a specific three-dimensional conformation, allowing them to bind with high specificity and affinity to molecular targets in a manner similar to that of monoclonal antibodies.
The second cDNA library was amplified by PCR with specially designed primer sets in which 6 nucleotides composed of CC (HaeIII-digested sequence) and 4 variable nucleotides were added to the 3′ end of the adaptor sequence.
Each strand of this molecule is a series of nucleotides, and each nucleotide is composed of a sugar-phosphate compound attached to one of four nitrogen-containing bases.
Their Bayesian analysis of Hexanchiformes, in using only a small portion (15%) of a single nucleotide sequence composed of five genes, COX1, NADH2, CYTB, 16S, and Rag1, may be compromised by too little data.
The remaining sequence reads were compared with a nonredundant bacterial nucleotide database composed of the bacterial reference genomes and draft genomes deposited at the NCBI site (ftp://ftp.ncbi.nih.gov/genomes/, NCBI Refseq release 51, January 2012 and Genbank release 187, December 2011).
Each nucleotide is composed of a phosphate attached to a ribose or deoxyribose sugar group which is attached to a nitrogenous base.
Each nucleotide is composed of a nitrogen-containing nucleobase either guanine (G), adenine (A), thymine (T), or cytosine (C as well as a monosaccharide sugar called deoxyribose and a phosphate group.
Part of this region is capable of folding into a hairpin-like formation (Fig. 2) with a loop consisting of 10 nucleotides and a stem composed of 21 paired nucleotides (five mismatches).
The B subregion at position 490 745 (numbers are from the first 5 S nucleotide) was composed of short 28-bp subrepeats.
