Protein is a chemical family name. Its shape may be helical. But a helical shape is of a spring type item shape.
All of them. Tertiary is the overall 3D shape of the protein Quaternary is what proteins it is attached to and how Primary is the actual order of the amino-acids which make up the chain Secondary is the way that that chain coils or folds So 'helix' refers to the coiling of the chain. Hence it is the secondary structure.
primary secondary
There are no known proteins such as helix proteins. Alpha helix is a secondary structure element found in proteins that formed by amino acids which can form helix. Other secondary structures are beta sheets and random coils.
In the DNA. The term "double helix" refers to the structure of DNA.
When non polar residues are situated near the helix termini, they are often exposed to solvent. Proteins will compensate for this problem by helix capping. This is simply the provision of H-bond partners for the otherwise bare N-H and C=O groups. Folding places the hydrophobic regions inside the protein.
The helix or coil structure in biology refers to the coiling of a protein or nucleic acid molecule into a three-dimensional shape. For example, alpha helices are a common secondary structure found in proteins where the polypeptide chain forms a tight helical structure. This coiled shape is important for the function and stability of many biomolecules.
In the DNA. The term "double helix" refers to the structure of DNA.
Linus Pauling was one of the first to propose the alpha helix structure of proteins in 1951. His work on the structure of proteins paved the way for our understanding of their function and importance in biology.
Some parts of a protein can have a helical structure - one of the most common secondary structures in proteins is the alpha helix.However, helix - especially double helix - will probably be more often used in the description of DNA, so be careful not to mistake the two.
"Helical" refers to its structure -- a helix (a spiral). See the related link below for an image.
The third image in the series represents a helix structure. This structure is characterized by a spiral form that is often seen in DNA molecules and certain proteins.
Proteins can form structures such as a helix or a sheet due to the specific arrangement of amino acids in their sequence. The hydrogen bonding between the amino acids in the polypeptide chain determines the secondary structure of the protein, leading to the formation of helices and sheets.