BCL2 and obesity due to melanocortin 4 receptor deficiency: The aim of this research – to study the expression of apoptosismolecular cell regulators from the BCL-2 family proteins:the antiapoptotic protein Bcl-2 and the proapoptoticprotein Bad in liver cells of male db/db mice at differentstages of obesity and DM2 development (at the age of 10 and18 weeks).