Why Do Different Cells Have Different Proteins

Gene regulation is how a cell controls which genes, out of the many genes in its genome, are “turned on” (expressed). … These different patterns of gene expression cause your various cell types to have different sets of proteins, making each cell type uniquely specialized to do its job.

Why do different cell types have different proteins?

All the cells of higher organisms have the same DNA but not the same proteins. Each type of specialised cell that forms a tissue has its own pattern of gene expression and, consequently, it contains a particular set of proteins that determine its function.

How do cells make different types of proteins?

In order for a cell to manufacture these proteins, specific genes within its DNA must first be transcribed into molecules of mRNA; then, these transcripts must be translated into chains of amino acids, which later fold into fully functional proteins.