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.

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#Unit 2. Cellular Organization

G1/S phase CDKs phosphorylate Cdh1 at the 

G1-S phase transition

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#Unit 5. Developmental Biology

Morphogens can be:

Transcription factors

Paracrine factors

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#Unit 3. Fundamental Processes

As a general rule, increased processivity reduces the likelihood of slippage at long sequence of dTn:dAn or frameshift mutation 

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#Unit 10. Ecological Principles

                     Proportional similarity analysis

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#Unit 3. Fundamental Processes

In E. coli DNA polymerase II is required to restart a replication fork when its progress is blocked by damage in DNA.