Hemoglobin in blood, components of the cytoskeleton, and enzymes in the digestive system are all examples of proteins, To understand more we need to know that....
Hemoglobin
Hemoglobin is a globular protein found inside erythrocytes that is responsible for the red coloring of blood.
Enzymes
Enzymes are proteins that serve to break food molecules into smaller and simpler substances, which facilitate the process of human metabolism. Without enzymes, our bodies would take much longer to digest what was consumed and would spend more energy to complete the same process.
Cytoskeleton
The cytoskeleton is a complex, highly dynamic network of proteins that participates in the processes of plasticity, transport and cell signaling, in addition to being the main determinant of cell morphology.
With this information, we can conclude that hemoglobin, digestive enzymes and the cytoskeleton are proteins.
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