Answer:
All of these
Explanation:
Myoglobin is a protein which contains iron and can bind oxygen similar to the hemoglobins. The myoglobin is found in the muscle cells as it stores the oxygen for muscle.
The myoglobin is made of 156 amino acids which forms the globular structure and form 3D conformation.
The 3D structure of myoglobin is formed of the conserved structure of proteins called motifs and the domains. These motifs and domains are composed of the helical forms and plated sheets.
Thus, all of these is the correct answer.
