FIG. 1 is a front left perspective view of a horizontal gel electrophoresis unit showing our new design, with the lid in open position;

FIG. 2 is another front left perspective view thereof;

FIG. 3 is a front left perspective view thereof, with the lid in closed position;

FIG. 4 is another front perspective view thereof;

FIG. 5 is a right rear perspective view thereof, with the lid in open position;

FIG. 6 is another right rear perspective view thereof, with the lid in closed position;

FIG. 7 is a top plan view thereof, with the lid in open position;

FIG. 8 is another top plan view thereof, with the lid in closed position;

FIG. 9 is a front elevational view thereof, with the lid in open position;

FIG. 10 is another front elevational view thereof, with the lid in closed position;

FIG. 11 is a left side elevational view thereof, with the lid in open position;

FIG. 12 is another left side elevational view thereof, with the lid in closed position;

FIG. 13 is a right side elevational view thereof, with the lid in open position;

FIG. 14 is another right side elevational view thereof, with the lid in closed position;

FIG. 15 is a rear elevational view thereof, with the lid in open position; and

FIG. 16 is another rear elevational view thereof, with the lid in closed position.

The broken line showing of the combs, wedges, gel deck and banana plug and electrode assembly with accompanying electrical connections and mechanical attachments in FIGS. 1-16 and the bottom of the article in FIGS. 1-6, and 9-16, is for illustrative purposes only and forms no part of the claimed design.