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The transferrin receptor (TfR) is a transmembrane glycoprotein that is highly expressed on multiple cell types, apart from highly differentiated cells. Two forms of the receptor have been characterised to...

English essays should be natural rather than forced, so it can be difficult to come up with a fixed structure to apply to every paragraph. However, there are some useful tips and pointers that can be used...

Viruses are parasitic organisms that cannot survive outside a living host. They are considered to be non-living, however this still remains debatable amongst virologists. They infect their host and utilis...

Begin by reading the poem all the way through. How does it sound in your head? Listen for alliteration, assonance, dissonance. Where is it smooth and where is it jarring? Think about the stresses of the w...

The action potential arriving at the presynaptic membrane causes the voltage gated calcium ion channels on the presynaptic membrane to open. This causes an influx of calcium ions into the presynaptic neur...