Definition of spacer gel in English:

spacer gel

noun

Biochemistry
  • (In electrophoresis) a section of a polyacrylamide gel that serves to concentrate the sample (typically protein) before separation; a stacking gel; (also) an additional layer of gel cast between the stacking gel and the resolving gel (used chiefly to aid the resolution of large protein molecules).

Origin

1960s; earliest use found in Science.