Another advantage of these early embryos for cell-cycle analysis is their large size. Goldman Lecture Presents: Dr. Figure The behavior of a temperature-sensitive cdc mutant. As a further refinement of this last technique, an amino acid sequence that forms a cleavage site for a highly specific protease can be engineered between the protein of choice and the histidine or GST tag. Although this cannot be seen in the picture, the nuclear envelope more
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