ABSTRACT Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is a group of housekeeping genes and its expression in various abiotic stresses is constitutive and stable. Molecularly, gene expression analysis techniques require internal controls for basic cell regulation. This study aims to analyze the DNA sequences encoding GAPDH in cocor bebek (Kalanchoe x laetivirens). The research procedur…