HSP21 (HEAT SHOCK PROTEIN 21). Identical to Small heat shock protein, chloroplast precursor (HSP21) [Arabidopsis Thaliana] (GB:P31170); similar to ATHSP23.6-MITO (MITOCHONDRION-LOCALIZED SMALL HEAT SHOCK PROTEIN 23.6) [Arabidopsis thaliana] (TAIR:AT4G25200.1); similar to chloroplast small heat shock protein [Senecio crataegifolius] (GB:ABD66589.1); contains InterPro domain HSP20-like chaperone (InterPro:IPR008978); contains InterPro domain Heat shock protein Hsp20 (InterPro:IPR002068)