A method of and system for memory access have address transformation circuitry for generating a single value of memory address from one or more corresponding values of an input quantity in which the number of values of the input quantity that correspond to a single value of the memory address varies across the range of values of the input quantity. The inventive compound can recognize a specific nucleotide sequence and can strongly bind to adjacent bases via covalent bonding, to regulate the expression of a DNA with the nucleotide sequence. A consumables use residual amount discriminating unit obtains consumables use residual amounts of the printers. The seat is provided integrally on the rim in the form of a substantially tubular appendage thereof and the anchorage member is received in a sealed manner with coupling of the cylinderpiston type in the tubular appendage.