Abstract
Abstract The 26S ribosomal (r)RNA of Trichoplusia ni cell cultures is dissociable when heated briefly and the products of this dissociation sediment in sucrose gradients to the region occupied by small species of rRNA. Others have shown this to be a distinguishing characteristic of insect rRNA. In contradistinction, L-cell mouse fibroblast rRNA is not thermolabile. The T. ni cell line is unable to synthesize sterols from [14C]acetate although this fast growing culture could efficiently synthesize other lipids (e.g. phospholipids) from acetate. The major phospholipids detected are phosphatidyl ethanolamine and phosphatidyl choline.
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