There are three D cyclins in mammals:

cyclins D1, D2, and D3

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#Id: 8202

#Section 3: Genetics, Cellular and Molecular Biology

Most of the lysosome membrane proteins, are highly glycosylated, which helps to protect them from the lysosome proteases

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#Id: 8151

#Section 3: Genetics, Cellular and Molecular Biology

Sec12

acts as a GEF factor for Sar1

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#Id: 9193

#Section 3: Genetics, Cellular and Molecular Biology

The allelic frequency at equilibrium (qˆ) depends on the relative fitnesses (usually expressed as selection coefficients) of the two homozygotes:

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#Id: 10301

#Section 2: General Biology

Three signals are required for activation of a naïve T cell

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#Id: 8895

#Section 3: Genetics, Cellular and Molecular Biology

Monotelic attachment 

only one kinetochore can attach to microtubules