ribosome biogenesis regulatory protein (RRS1) family protein. Identical to Ribosome biogenesis regulatory protein homolog [Arabidopsis Thaliana] (GB:Q9SH88;GB:Q56WN3;GB:Q8LA50); similar to unnamed protein product [Vitis vinifera] (GB:CAO39739.1); contains InterPro domain Ribosomal biogenesis regulatory protein; (InterPro:IPR007023)