How is antigen-antibody binding similar to an enzyme-substrate interaction?

Antibodies and enzymes are made up of the same building blocks, the  common amino acids, arranged in sequences that generate  structures capable of supporting diverse types of interactions with ligands.

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.

energy and particles