Figure 4.

Characterization of the molecular weight of HA by agarose gel electrophoresis. HA standards and OTC eye products were subjected to agarose gel electrophoresis, and molecular weight was determined based on the electrophoretic profile of two HA ladders that contained HA standards of known molecular weights. The molecular weights of HA (kDa) in each ladder (I and II) are indicated next to each ladder.