In terms of the contents and compositions of macromolecules in an Anabaena cell in the literature, the requirements of monomeric building blocks and precursor metabolites for cell synthesis were calculated, and an appropriate metabolic stoichiometry on cell biosynthesis was derived.

Telomerase activity has been was detected by telomeric repeat amplification protocol (TRAP)in immortal cell lines derived from malignant tumors of human lung, breast and skin, in mormal somatic cells from the tissue types mentioned above, and in normal ovary and tests tissues.

Isolation and cultivation of human embryonic germ cells;