A transmembrane receptor that functions at the cell membrane has an exoplasmic N-terminal sequence, a signal-anchor sequence, and a stop-transfer-anchor sequence. This protein was first inserted into the membrane where?

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Complete Question:

A transmembrane receptor that functions at the cell membrane has an exoplasmic N-terminal sequence, a signal-anchor sequence, and a stop-transfer-anchor sequence. This protein was first inserted into the membrane where?

a) in the late endosome

b) in the Endoplasmic Reticulum

c) at the plasma membrane

d) in the cis- Golgi

Option b) In the Endoplasmic Reticulum

Explanation:

A transmembrane receptor is a the amino acid chain of a transmembrane proteins.

The proteins is inserted into the Endoplasmic Reticulum through the process of translocation.

The amino acid chain of the transmembrane protein has an exoplasmic N-terminal sequence, a signal-anchor sequence which is hydrophobic alpha helix and a stop-transfer-anchor sequence which consists of a 22-25 hydrophobic amino acid sequence.

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