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Ribozymes, catalytic RNA molecules that cleave a complementary mRNA sequence, have potential as therapeutics for dominantly inherited disease. Twelve percent of American patients with the blinding disease autosomal dominant retinitis pigmentosa (ADRP) carry a substitution of histidine for proline at codon 23 (P23H) in their rhodopsin gene, resulting in(More)
The high-affinity choline transporter CHT1 mediates choline uptake essential for acetylcholine synthesis in cholinergic nerve terminals. CHT1 belongs to the Na(+)/glucose cotransporter family (SLC5), which is postulated to have a common 13-transmembrane domain core; however, no direct experimental evidence for CHT1 transmembrane topology has yet been(More)
Neovascularization (NV) of the retinal pigment epitheium (RPE) by retinal capillaries following degeneration and loss of photoreceptor cells is a widely recognized phenomenon in rodents. NV of the RPE usually occurs several weeks to months after the loss of photoreceptor cells. We have observed that NV of the RPE occurs much earlier in a line of P23H mutant(More)
The fluorescence of 9,10-dioxa-syn-3,4,6,7-tetramethylbimane (bimane) was found to be quenched in the presence of nitrated aromatic amino acid. Bimane peptides containing nitrated amino acid (1a, b) were shown to be useful fluorogenic substrates for the assay of angiotensin I converting enzyme (ACE) from rabbit lung, similar to bimane substrate containing(More)
As a sensitive fluorometric assay for the activity of angiotensin converting enzyme, bimane-peptides containing tryptophan, i.e., 1,7-dioxo-2,5,6-trimethyl-1H,7H-pyrazolo [1,2-a]pyrazol-3-yl-methylthiomethylcarbonyl-glycyl (or L-phenylalanyl)-L-tryptophyl-L-leucine (or L-proline), were synthesized and shown to be potent fluorogenic substrates for the(More)
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