Calix[4]crown-5-ether as a biolinker for immobilization of protein and DNA in fluorescence glass slide chip

Binding affinity between calix4]crown-5-ether and amino acids have been compared by studying the complexation association constant, and the best value has been obtained from complex of calix4]crown-5 ether, and HrSOD tagged with Arg and Lys were tested to investigate the effects of specific residues in protein immobilization on calix4]crown-5-ether. The protein tagged with 9Args has been shown to have much better immobilization potential. Taking advantage of the similar structure of a moiety of guanine base to that of Arg side chain, different homo-oligonucleotides have been immobilized, and it was found that calix4]crown-5-ether is an appropriate agent in the immobilization of dGTP homo-oligonucleotides. The results demonstrate that calix4]crown-5-ether on glass slide chip could be applied as an excellently oriented immobilization agent for protein or for DNA microarray designing. It has the ability of single base differentiation in SNP sequence detection.