STRUCTURE AND PROPERTIES OF PEPTIDES QUIZ

more numerous than Vander Waals interactions

analogous to the steps in a spiral staircase

not present at Phe residues

roughly parallel to the helix axis

the Fe3+ and histidine

the Fe2+ and cysteine

the Fe2+ and histidine

the Fe3+ and cysteine

Hydrogen bond

Van der waals force

partial double bond

truly double bond

Epsilon

Alfa

Delta

Gamma

have Y = F = 180°

do not occur in nature

are equivalent to the (3-sheet structure

also have a cis geometry in their peptide bonds

two polypeptide chains, one α-chains and one β-chains

six polypeptide chains, two α-chains and four β-chains

four polypeptide chains, two α-chains and two β-chains

five polypeptide chains, two α-chains and three β-chains

C20H68O29N10

C20H50O20N10

C20H32O11N10

C20H40O10N10

Complete quaternary structure

Thermodynamic stability

Complete tertiary structure

Complete secondary structure

is planar because of steric hinderance

only found between proline residues

usually cis unless proline is the next amino acid

usually trans unless proline is the next amino acid

0.9

1.7

0.5

0.1