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1. Fate of polychlorinated biphenyls, metals, and other elements in papers fed to lactating cows.

18. Preparation and properties of the repeating sequence polymer d(A-A-T)n-d(A-T-T)n.

20. Simultaneous reduction and mercuration of disulfide bond A6-A11 of insulin by monovalent mercury.

21. Ornithine degradation in Clostridium sticklandii; pyridoxal phosphate and coenzyme A dependent thiolytic cleavage of 2-amino-4-ketopentanoate to alanine and acetyl coenzyme A.

22. Reaction of cytidine with ethylating agents.

23. "Nonisomerizable" 2'-and 3'-O-aminoacyl dinucleoside phosphates. Chemical synthesis and acceptor activity in the ribosomal peptidyltransferase reaction.

24. Ribonucleic acid ligase activity of deoxyribonucleic acid ligase from phage T4 infected Escherichia coli.

25. Reaction of adenosine with ethylating agents.

26. Derivatives of N-(N-(9-beta-D-ribofuranosylpurin-6-yl)carbamoyl)threonine in phosphodiesterase hydrolysates of wheat embryo transfer ribonucleic acid.

27. Penicillin-induced secretion of soluble, uncross-linked peptidoglycan by Micrococcus luteus cells.

28. Synthesis of some trinucleoside monophosphates of biological interest.

29. Platelet aggregation inhibitors. 7. S-substituted 2-thioadenosine 5'-monophosphates.

30. Physical identity of the SV40 deoxyribonucleic acid sequence recognized by the Eco RI restriction endonuclease and modification methylase.

31. Synthesis of the vasoactive intestinal peptide (VIP).

32. Wall peptidoglycan in Aerococcus viridans strains 201 Evans and ATCC 11563 and in Gaffkya homari strain ATCC 10400.

33. Gluconeogenesis from fructose in isolated rat liver. Stimulation by glucagon.

34. Binding of radioactive oligonucleotides to ribosomes.

35. Chemical evidence for conformational differences between the red- and far-red-absorbing forms of oat phytochrome.

36. Studies on the cell walls of Micrococcus lysodeikticus. Fractionation of the nondialyzable components from a lysozyme digest of cell walls.

37. Structural studies of calf thymus F3 histone. II. Occurrence of phosphoserine and -N-acetyllysine in thermolysin peptides.

38. Adrenocorticotropin. Synthesis of (6-phenylalanine)- 1-19 -adrenocorticotropic hormone and its steroidogenic, melanocyte-stimulating, and lipolytic activity.

39. Adenylyl imidodiphosphate, an adenosine triphosphate analog containing a P--N--P linkage.

40. Sulfenylation of tryptophan-62 in hen egg-white lysozyme.

41. Disulfide bridge peptides and glycopeptides of a human IgAl myeloma globulin.

42. Angiotensin-converting enzyme inhibitors from the venom of Bothrops jararaca. Isolation, elucidation of structure, and synthesis.

43. Nearest-neighbor frequencies of mitochondrial deoxyribonucleic acid in mouse liver.

44. Synthesis and hormonal activities of 8-L-homolysine-vasopressin.

45. Structure of schizokinen, an iron-transport compound from Bacillus megaterium.

46. Studies on the inhibition of glutamine synthetase by methionine sulfone.

47. Substrate properties of 8,2'- and 8,3'-O-cyclo derivatives of adenosine 5'-monophosphate with adenosine 5'-monophosphate utilizing enzymes.

48. Erythromycin, a peptidyltransferase effector.

49. Synthesis and properties of polyribonucleotides containing N 2 -methyl and N 2 -dimethylguanylic acid in polyguanylic acid.

50. Ligase joining of oligodeoxythymidylates.