Adsorption of a random heteropolymer at a potential well revisited: location of transition point and design of sequences

The adsorption of an ideal heteropolymer loop at a potential point well is investigated within the framework of standard random matrix theory. On the basis of a semi-analytical/semi-numerical approach a histogram of transition points for the ensemble of quenched heteropolymer structures with bimodal symmetric distribution of types of chain links is constructed. It is shown that the sequences having transition points in the tail of the histogram display correlations between nearest-neighbour monomers. (author)