A laboratory colony was established in order to enable molecular sexing in premature stages in the brown planthopper, Nilaparvata lugens. We found four male-specific amplified fragment length polymorphisms (AFLPs) in the planthopper, and sequenced one of the AFLPs along with its 5' flanking region (1,423 bp in total). PCR primers were designed based on the nucleotide sequence information so tha...

To examine which sequences are involved in regulating the potato sucrose synthase gene Sus3-65, we examined a series of deletion and substitution constructs in transgenic potato and tobacco plants. In a construct containing 3.9 kb of 5' flanking region, substitution of the native 3' sequence with the nopaline synthase 3' sequence and deletion of the leader intron did not significantly affect ex...

Lactoferrin is a glycoprotein with molecular weight 80 kDa iron-binding bond, which is composed of 690 amino acids. In most mammalian body fluids such as sweat, semen, tears, and saliva and milk neutrophil granules there. bovine lactoferrin gene be associated with susceptibility/resistance to mastitis and even with some economically important production traits. This study was carried out to det...

In the present study, we demonstrate by transcript mapping that the injected Xenopus skeletal muscle alpha-actin gene is transcribed and spliced in Xenopus oocytes but not correctly initiated at the alpha-actin promoter. This leads to correctly spliced transcripts even if constructs without putative promoter sequences are injected. On the other hand, alpha-actin transcripts are translated in in...

Extracellular signal proteins induce the homeotic gene labial (lab) to high levels of localised expression in the endoderm of Drosophila embryos. We aimed to identify cis-regulatory elements within the lab gene that respond to this induction by analysing the activity of stably integrated reporter gene constructs. Dissection of lab 5' flanking sequences reveals two types of response elements. On...

Cloned ribosomal DNA (rDNA) from mouse, which contains the initiation site of 45S pre-rRNA transcription and 5' flanking sequences, has been used as the template in an in vitro transcription system. In the presence of extracts from rapidly growing Ehrlich ascites cells, RNA polymerase I initiates specifically in that region of purified rDNA where the 5' end of 45S rRNA has been mapped. This is ...

The elements comprising the mouse rpS16 promoter were characterized by transfection experiments with mutant genes in which various portions of the 5' flanking region and exon I were removed or substituted with extraneous DNA sequence. These experiments were carried out with otherwise intact rpS16 genes transfected into monkey kidney (COS) cells and also with chimeric rpS16-CAT gene constructs t...

We introduced a mouse tyrosinase minigene, mg-Tyrs-J, in which the authentic genomic 5' non-coding flanking sequence was fused to a mouse tyrosinase cDNA, into fertilized egges of albino mice. Of the 25 animals that developed from the injected eggs, four mice exhibited pigmented hair and eyes. Histological analysis of the transgenic mice revealed that the melanogenesis was restricted to hair bu...

RNA species have been identified in murine erythroid cells which contain both 5' flanking and structural gene sequences from the beta maj globin gene. Two nonpolyadenylated RNA transcripts, average 3700 and 1800-1900 nucleotides long, were identified by denaturing agarose gel electrophoresis and were found to hybridize to both 5' and 3' beta maj globin flanking sequences. This finding suggests ...