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Chromatographic characterisation of an estrogen-binding affinity column containing tetrapeptides selected by a
Cinzia Tozzi1, Laura Anfossi, Gianfranco Giraudi
1Department of Analytical Chemistry, University of Torino, Turin, Italy. cinzia.tozzi@unito.it
Abstract:
In our work we performed a combinatorial synthesis in aqueous medium to prepare peptide libraries from which we would select amino acid sequences with binding properties towards estrogens. We prepared an affinity solid-phase by using a tetrapeptide with good selectivity and affinity towards the estradiol (K> 10(4) M(-1)). Samples of estrogens in buffer, in tap water and in river water were applied to our column in which they were retained (k' > 116). These could only be eluted in a few millilitres of methanol mobile phase. In all cases there were quantitative recoveries. The pre-concentration studies were promising.