Words similar to quaternary
Example sentences for: quaternary
How can you use “quaternary” in a sentence? Here are some example sentences to help you improve your vocabulary:
E174 in ACR3 and S218 in ACR4 are required for catalytic function [ 12 ] . Substitution of H59 in ACR1 converted CD39 into an ADPase in a quaternary structure dependent manner [ 13 ] . Mutation of W187A in ACR3 affected CD39 folding and translocation, while mutation of W459A in ACR5 increased ATPase activity but diminished ADPase activity [ 14 ] . Mutations of D62 and G64 of ACR1 and D219 and G221 of ACR4 demonstrated that the nucleotide phosphate binding domains of NTPDases are similar to those present in the actin/heat shock protein/sugar kinase superfamily [ 15 ] . These results suggest that the conserved residues of the ACR1 to 5 regions are involved in the catalytic mechanism of CD39.
The protonated ammonium nitrogen is also making polar interaction with the delocalized electron and backbone carbonyl of Trp182, and is less than 1A away from the quaternary nitrogen of docked acetylcholine.
Rad52 functions in conjunction with the RecA ortholog, the RAD51 recombinase in double-strand break repair and meiotic recombination [ 6 ] . RAD52 binds ssDNA during recombination and also shows a quaternary organization similar to those of RecT/Redβ and ERF [ 16 26 ] . However, RAD52-like proteins showed no detectable sequence similarity with either the ERF or the RecT/Redβ-like proteins.
S. pombe RNA triphosphatase Pct1 is a 303-amino acid polypeptide with a homodimeric quaternary structure [ 12 ] . The pct1 +gene contains a single intron within the open reading frame [ 12 ] . S. pombe RNA guanylyltransferase Pce1 is a 402-amino acid monomeric protein [ 20 ] ; there are no introns within the pce1 +gene.
The similarity between these two systems is further extended by the observation that the RecT/E system can complement mutations in the λ exo/Redβ system [ 10 12 ] . In eukaryotes, RAD52 protein has been shown to exhibit properties similar to those of RecT and Redβ proteins: it binds ssDNA and promotes strand exchange via the pairing of complementary single strands [ 6 13 ] . In vitro studies on quaternary structures have shown that the single strand annealing proteins (SSAPs), RecT, Redβ, ERF and RAD52, form similar helical super-structures [ 14 15 16 17 ] . This has led to the proposal that RecT, Redβ, ERF and the eukaryotic RAD52 function in an analogous fashion, and even are "structural homologs" [ 14 ] .
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