NFD1 (NUCLEAR FUSION DEFECTIVE 1); structural constituent of ribosome. Identical to 50S ribosomal protein L21, mitochondrial precursor (RPL21M) [Arabidopsis Thaliana] (GB:Q8L9A0;GB:O65556;GB:Q9B7N7); similar to 50S ribosomal protein L21, chloroplast / CL21 (RPL21) [Arabidopsis thaliana] (TAIR:AT1G35680.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO46958.1); contains InterPro domain Ribosomal protein L21; (InterPro:IPR001787)