| http://www.w3.org/ns/prov#value | - A method of modifying telomerase or telomere function, comprising interacting a porphyrin with telomeric DNA wherein the porphyrin has a formula: ##STR186## where Ar1, A2, Ar3 and Ar4 are independently ##STR187## where m is 0-3. x is O, NH, CO, or ##STR188## and M is 2H+ or CH2 and where ligand is a metal ion selected from the group consisting of Ca, Sc, Mn, Fe, Co, Ni, Cu, Zn, Sr, Y, Ru, Pd, Ag,
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