This kit, provided in 2 sizes (10 reactions: ENZ-42420; 100 reactions: ENZ-42421) contains all the buffers, enzymes, purification columns, elution tubes for cDNA synthesis from 250 ng up to 5000 ng total RNA. BIOARRAY™ Single-round RNA amplification and biotin labeling system is complete kit, composed of reagents for cDNA synthesis, purification and in vitro transcript labeling.