AHB2 (Arabidopsis hemoglobin2) belongs to the plant globin family, and is a heme-, iron- and oxygen-binding protein. Expressed in rosette leaves and young roots, and induced by a variety of environmental stresses. Synonymes: AHB2, ARABIDOPSIS HEMOGLOBIN 2, ARATH GLB2, ATGLB2, GLB2, HAEMOGLOBIN 2, HB2, HEMOGLOBIN 2, NON-SYMBIOTIC HAEMOGLOBIN 2, NSHB2.