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).

TLS Online TPP Program

#Id: 7411

#Unit 5. Developmental Biology

TLS Online TPP Program

#Id: 8031

#Unit 1. Molecules and their Interaction Relevant to Biology

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#Id: 2330

#Unit 3. Fundamental Processes

There are RNA polymerase crystal structures that provide considerable insight into how the enzyme retains contact with its substrate while breaking and remaking bonds in the process of the nucleotide addition cycle and undergoing translocation by a Brownian ratchet mechanism.

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#Id: 5868

#Unit 10. Ecological Principles

The richness of some areas is increased by the presence of corridors

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#Id: 386

#Unit 2. Cellular Organization

The H32.H42 tetramer bound to DNA recruits two copies of the H2A.H2B dimer to complete the assembly of the final nucleosome