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[ adjective ] lacking cells
Examples "cell-free systems" "a cell-free homogenate of the thyroid" Used in print (Jacob Robbins et al., "The thyroid-stimulating...)However , the formation of organically bound iodine , mainly mono-iodotyrosine , can be accomplished in cell-free systems . This iodoprotein does not appear to be the same as what is normally present in the thyroid , and there is no evidence so_far that thyroglobulin can be iodinated in_vitro by cell-free systems . If tyrosine and a system generating hydrogen_peroxide are added to a cell-free homogenate of the thyroid , large quantities of free mono-iodotyrosine can be formed ( Alexander , 1959 ) . Its synthesis has not been demonstrated in cell-free systems , nor has its synthesis by systems with intact thyroid cells in_vitro been unequivocally proven . Related terms |
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