Final answer:
Sec23 and Sec24 are adaptor proteins involved in recognizing cargo molecules for transportation in vesicles within the cell.
Step-by-step explanation:
Adaptor proteins such as Sec23 and Sec24 perform crucial roles in the cellular transport mechanism, specifically in the cargo recognition and vesicle formation process. These proteins are primarily responsible for recognizing cargo molecules, as they are involved in selecting the cargo that will be transported in vesicles as part of the cellular trafficking process. As part of the COPII complex, they help in the differentiation of cargo proteins, ensuring that the correct molecules are packaged into transport vesicles that bud from the endoplasmic reticulum (ER) and then transported to the Golgi apparatus.