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In a study of juvenile hormone-regulated gene expression, we isolated an anonymous cDNA representing a message that was strongly suppressed by juvenile hormone in the fat body of the cockroach Blaberus discoidalis. The protein deduced from the cDNA sequence showed compelling resemblance in sequence to the transferrins, a superfamily of internally(More)
Hypertrehalosemic hormone (a carbohydrate-mobilizing neuroendocrine decapeptide) and starvation markedly increased levels of a cockroach (Blaberus discoidalis) fat body cytochrome P450 message. The gene represented by the cloned P450 cDNA has been named CYP4C1 (cytochrome P450 family 4, subfamily C, gene 1), a newly identified member of the ubiquitous(More)
A gene sequence encoding the neuropeptide adipokinetic hormone (AKH) was isolated from a genomic library of the tobacco hornworm, Manduca sexta. 2.5 x 10(5) recombinant plaques were screened with a 29-mer oligonucleotide substituted with deoxyinosine at six ambiguous codon positions. One clone was obtained from which we deduced an intronless gene encoding(More)
The endosymbiotic theory of the origin of mitochondria is widely accepted, and implies that loss of genes from the mitochondria to the nucleus of eukaryotic cells has occurred over evolutionary time. However, evidence at the DNA sequence level for gene transfer between these organelles has so far been limited to a single example, the demonstration that a(More)
In the tobacco hornworm (Manduca sexta), vitellogenin (Vg), the major yolk protein precursor, and its mRNA are first detectable in the prepupal stage; and production of both can be enhanced by methoprene, a juvenile hormone (JH) analog. Competence to respond to methoprene is acquired after ecdysteroid-initiated commitment for metamorphosis. Here we show(More)
The genome of the African migratory locust, Locusta migratoria (Class Insecta, Order Orthoptera, Family Acrididae) contains an interspersed DNA sequence family, designated the Lm1 family. This family consists of short (approximately 195-bp), widely dispersed, highly reiterated (approximately 6 X 10(5) copies/haploid genome) repeat units, which account for(More)
Hypertrehalosemic hormone (HTH) is a neuropeptide in the adipokinetic hormone/red pigment-concentrating hormone (AKH/RPCH) family that stimulates the synthesis of trehalose, the main blood sugar of many insects. The preproHTH of the cockroach Blaberus discoidalis was cloned from the corpora cardiaca (CC), the endocrine source for HTH, and the deduced(More)