In the Isoelectric Focusing pH gradient is formed by the introduction into the gel of compounds known as ampholytes, which are complex mixtures of synthetic polyamino-polycarboxylic acids Ampholytes can be purchased in different pH ranges covering a wide band (e.g. pH 3–10).

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#Id: 8991

#Unit 11. Evolution and Behavior

Incomplete lineage sorting (hemiplasy)

If you make a phylogenetic tree of how the alleles are related to each other, it does not mirror how the species split apart.

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#Id: 8117

#Unit 1. Molecules and their Interaction Relevant to Biology

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#Id: 8078

#Unit 13. Methods in Biology

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#Id: 6507

#Unit 7. System Physiology – Animal

Some of the tyrosine is formed from phenylalanine, by Phenylalanine hydroxylase

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#Id: 6681

#Unit 3. Fundamental Processes

Each snRNP contains a single snRNA (100-300 nt) and several (20) proteins. The U4 and U6 snRNPs are usually found together as a di-snRNP (U4/U6) particle.