tokens: Sequence analysis revealed that the MEMA protein is identical with a 160 kDa nuclear ' domain rich in serines ' ( DRS ) protein occurring free in the nucleoplasm and in U2-ribonucleoprotein structures .
folded_tokens: sequence analysis reveal that the MEMA protein be identical with a 160 kda nuclear ' domain rich in serine ' ( dr ) protein occur free in the nucleoplasm and in u2-ribonucleoprotein structure .