l threonine/hypersensitivity

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New cyclosporin A analogue: synthesis and immunosuppressive activity.

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A synthetic analogue of cyclosporine A, in which an unusual amino acid (4R)-N-methyl-4-butenyl-4-methyl-L-threonine (MeBmt) is replaced with L-threonine (Thr), was synthesized by the solid phase method. Its activity in the humoral response to sheep red blood cells in vitro and in vivo in mice was

Threonine deaminase from Escherichia coli: feedback-hypersensitive enzyme from a genetic regulatory mutant.

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A mutation, ilvA538, in the gene coding for the biosynthetic L-threonine deaminase of Escherichia coli K-12 has previously been demonstrated to have pleiotropic regulatory effects leading to low and invariant expression of some of the isoleucine-valine biosynthetic enzyme, and altered expression of

Adjuvant activities of quinonyl-N-acetyl muramyl dipeptides in mice and guinea pigs.

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The adjuvant and tumor-suppressive activities of the quinonyl [2,3-dimethoxy-5-methyl-6-(9'-carboxynonyl)-1,4-benzoquinone (QS-10)] derivatives of N-acetyl muramyl dipeptides were examined. N-Acetyl muramyl-L-valyl-D-isoglutamine (MurNac-L-Val-D-isoGln), QS-10-MurNAc-L-Val-D-isoGln, and their methyl

Suppression of in vivo IgE and tissue IL-4 mRNA induction by SDZ 280.636, a synthetic muramyl dipeptide derivative.

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Modulation of IgE isotype expression on B cells is one of the numerous effects of muramyl peptides on the regulation of the immune system. A non toxic diacyl glycerol derivative of muramyl dipeptide (MDP), in which the L-alanine is replaced by L-threonine (MDP-Threo-GDP; SDZ 280.636), is currently

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