Answer:
If the DNA was part of a gene for a different protein, the DNA sequence would be different. Each gene has a unique sequence of DNA that provides the instructions for building a specific protein.
Changes in the DNA sequence would lead to changes in the amino acid sequence of the protein, resulting in a different protein with different functions. Additionally, different genes have different regulatory elements that control when and where the gene is expressed, as well as the level of expression.
Therefore, the DNA sequence and regulatory elements of a gene for a different protein than crystallin would be different from the DNA sequence and regulatory elements of the crystallin gene.
Hope this helps!