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1. Using these 10 amino acids as building blocks, propose a sequence for an inte

ID: 188563 • Letter: 1

Question

1. Using these 10 amino acids as building blocks, propose a sequence for an integral protein. Your sequence must have a transmembrane portion of a length of 6 amino acids, and you must have at least 2 amino acids inside and 2 outside the cell. Draw and label your polypeptide with respect to the plasma membrane (you can use abbreviations and you do not need to draw the molecular structures). Be sure to clearly label ALL elements of your drawing. H3 Glycine (G, Gly) Proline (P, Pro) coo H,N-COOM H2N COOH H3N-C-H HN-C-H H2N COOH alanine phenylalanine Cysteine OH Tyrosine serine glutamic acid Lysine Histiane

Explanation / Answer

Transmembrane amino acids: glycine, alanine, tyrosine, phenylalanine, serine, glutamic acid

cytoplasmic domain : proline, cysteine

Justification : aliphatic and neutral amino acids are present in the transmembrane region, while

extracellular domain : lysine and histidine

Justification : basic amino acids play a role in signaling