RCAN2 and myocardial infarction: In addition to CDR1as, a 2021 study on porcine myocardium sampled on the third day following a reperfused myocardial infarction, our group uncovered a number of circRNAs with differential expression profiles in infarcted versus healthy myocardium, amongst them circ-RCAN2 and circ-C12orf29 [15].