When used in conjunction with the PD-L1 IHC 28-8 pharmDx as a companion test ... patients 12 years of age and older with tumor cell PD-L1 expression < 1% that have previously untreated advanced ...
Companion cells Provide the energy required for transporting substances in sieve tubes. Xylem Xylem vessels Transport water and dissolved minerals from the roots, up the plant. Growing points ...
Dissolved sugars and amino acids can be transported both up and down the stem. Companion cells, adjacent to the sieve tubes provide energy required to transport substances in the phloem.
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