title: Polysomes and protein synthesis during development of Ilyanassa obsoleta.
mesh_terms: D000818:Animals; D002247:Carbon Isotopes; D002499:Centrifugation, Density Gradient; D004625:Embryo, Nonmammalian / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D005314:Embryonic and Fetal Development; D007930:Leucine / Q000378:metabolism; D008854:Microscopy, Electron; D011132:Polyribosomes / Q000187:drug effects / Q000378:metabolism*; D014176:Protein Biosynthesis; D012260:Ribonucleases / Q000494:pharmacology; D012623:Seawater; D012908:Snails
chemical_list: D002247:Carbon Isotopes; D012260:Ribonucleases; D007930:Leucine