The history of science shows many close connections between physics and
astronomy. It is well known that a number of physical laws evolved from a base
of astronomical observations. For example, Kepler observed and, later Newton
derived, the laws of gravitation while studying the motion of planets and their
satellites. The existence of thermonuclear energy was solidly established when
it explained the energy balance of the Sun and stars.
GM-CSF is one of several naturally occurring glycoproteins
that regulate leukocyte production, migration and function.
It has been produced in different cell types, with different
properties that depend on the production process used. The
purpose of this work was to characterize the recombinant
human GM-CSF from an engineered Chinese hamster
ovary cell line grown in suspension and as adherent culture
for the identification of the glycosylation sites and the defi-nition of the glycosidic moiety, including the degree of site
Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học quốc tế cung cấp cho các bạn kiến thức về ngành y đề tài: Precise pattern of recombination in serotonergic and hypothalamic neurons in a Pdx1-cre transgenic mouse line
In the present study, we describe the production of transgenic silkworms
expressing a recombinant mouse mAb in their cocoons. Two transgenic
lines, L- and H-, were generated that carried cDNAs encoding the L- and
H-chains of a mouse IgG mAb, respectively, under the control of the
enhancer-linked sericin-1 promoter.
Orexin A and B (also known as hypocretins), two recently discovered neuropeptides, play an important role in food intake, sleep/wake cycle and neuroendocrine functions. Orexins are endogenous ligands of two G-protein-coupled receptors, termed OX1 and OX2. This work presents the ﬁrst short orexin A and B analogues, orexin A 23–33 and orexin B 18–28, with high aﬃnity (119 ± 49 and 49 ± 23 nM) for OX1 receptors expressed on SK-N-MC cells and indicates the importance of the C-terminal part of the orexin peptides for this ligand–receptor interaction.
This report describes an efficient strategy for amplified
functional purification of the human H1 receptor after
heterologous expression in Sf9 cells. The cDNA encoding a
C-terminally histidine-tagged (10xHis) human histamineH1
receptor was used to generate recombinant baculovirus in a
Spodoptera frugiperda-derived cell line (IPLB-Sf9). As
judged from its ligand affinity profile, functional receptor
could be expressed at high levels (30–40 pmol per 10
To establish stable cell lines that produce recombinant multisubunit proteins, it is usually necessary to cotransfect cells with several independent gene constructs. Here, we show that a stepwise fusion of individually transfected cells, results in a fused cell-line that secretes a complete multisubunit protein. Functional expression of recombinant multisubunit proteins may require a deﬁned expression ratio between each protein subunit. The cell-fusion technology described allows a predeﬁned expression level of each subunit.
Recombinant, bacterially expressed apoptin protein induces
apoptosis inhuman tumour cell lines but not innormal cells,
mimicking the behaviour of ectopically expressed apoptin.
Recombinant apoptin is isolated exclusively as a highly
stablemultimeric complex of 30–40monomers, with little, if
any,a-helical and b-sheet structure. Despite its apparent
disorder, multimeric apoptin is biologically active. Here, we
present evidence thatmost of the apoptinmoietieswithin the
complex may well share a similar conformation.