beta sheets are a secondary protein structure as a consequen

beta sheets are a secondary protein structure as a consequence of hydrogen bonding and often have one side facing the surface of the protein and one side facing the interior, creating an amphiphilic sheet ( ). Which sequence listed below would achieve this? Explain. (5 points)

a. ALSCDVETYWLI

b. DKLVTSIAREFM

c. DSETKNAVFLIL

d. TLNISFQMELDV

e. VLEFMIDASVLD

Solution

Out of the given five single-letter code for the amino acids sequence, 4 is the only one which is fitting in the criteria given in the question as its alternate amino acids are either non-polar or polar residue

Threonine - polar

Leucine - non-polar

Asparagine - Polar

Isoleucine non-polar

Serine - polar

Phenylalanine - non-polar

Glutamine - polar

Methionine non-polar

Glutamic acid - polar

Leucine - non-polar

Asparagine - polar

Valine - non-polar