Involved in transcriptional regulation as an activator. Expressed in fetal heart, heart, skeletal muscle, pancreas and placenta. Expressed in heart as early as the 24th week of gestation. Belongs to the krueppel C2H2-type zinc-finger protein family. It is uncertain whether Met-1 or Met-20 is the initiator. A 'GT' insertion (rs59214675) allows to extend the sequence in the N-terminus. The majority of mRNAs do not have this insertion and the corresponding protein sequences start at Met-20.