ubiquitin extension protein 2 (UBQ2) / 60S ribosomal protein L40 (RPL40A). Identical to Ubiquitin (UBQ16) [Arabidopsis Thaliana] (GB:P59263;GB:O80715;GB:Q38875;GB:Q9LDJ2;GB:Q9LYW1;GB:Q9M0W3;GB:Q9M1P9;GB:Q9S7X3); similar to UBQ1 (EARLY-RESPONSIVE TO DEHYDRATION 16, UBIQUITIN EXTENSION PROTEIN 1), protein binding [Arabidopsis thaliana] (TAIR:AT3G52590.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO48597.1); contains InterPro domain Ribosomal protein L40e; (InterPro:IPR001975); contains InterPro domain Ubiquitin; (InterPro:IPR000626)