METRNL/meteorin-like protein is caused by hormonal changes caused by exercise or cold exposure, which increases energy expenditure. After exercise, it is expressed in skeletal muscle, whereas during cold exposure, it is expressed in adipose tissue. METRNL/Meteorin-like Protein, Human (His-SUMO) is the recombinant human-derived METRNL/Meteorin-like protein, expressed by E. coli , with N-SUMO, N-6*His labeled tag.