MJ Research Alpha Unit Block Assembly. An interchangeable sample-block/heat-pump assembly, for use with DNA Engine Line (the DNA Engine, Dyad, Disciple, and Tetrad cyclers) multi-bay thermal cyclers. Equipped with lids that are heated, eliminating the need for oil overlay. The amount of pressure is set by the thumbwheel, and the temperature is controlled by the thermal cycler software. Consists of a flat reaction module, and accommodates microarrays, biochips, and reaction vessels.