Hledali jste: zona

Katalogové číslo: (PRSI56-916)

Dodavatel: ProSci Inc.

Popis: The mammalian zona pellucida, which mediates species-specific sperm binding, induction of the acrosome reaction and prevents post-fertilization polyspermy, is composed of three to four glycoproteins, ZP1, ZP2, ZP3, and ZP4. ZP1 ensures the structural integrity of the zona pellucida.

Měrná jednotka: 1 * 400 µl

New Product Akce

Katalogové číslo: (PRSI30-070)

Dodavatel: ProSci Inc.

Popis: The zona pellucida is an extracellular matrix that surrounds the oocyte and early embryo. It is composed primarily of three or four glycoproteins with various functions during fertilization and preimplantation development. ZP2 is a structural component of the zona pellucida and functions in secondary binding and penetration of acrosome-reacted spermatozoa. The nascent protein contains a N-terminal signal peptide sequence, a conserved ZP domain, a consensus furin cleavage site, and a C-terminal transmembrane domain. It is hypothesized that furin cleavage results in release of the mature protein from the plasma membrane for subsequent incorporation into the zona pellucida matrix. However, the requirement for furin cleavage in this process remains controversial based on mouse studies.The zona pellucida is an extracellular matrix that surrounds the oocyte and early embryo. It is composed primarily of three or four glycoproteins with various functions during fertilization and preimplantation development. The protein encoded by this gene is a structural component of the zona pellucida and functions in secondary binding and penetration of acrosome-reacted spermatozoa. The nascent protein contains a N-terminal signal peptide sequence, a conserved ZP domain, a consensus furin cleavage site, and a C-terminal transmembrane domain. It is hypothesized that furin cleavage results in release of the mature protein from the plasma membrane for subsequent incorporation into the zona pellucida matrix. However, the requirement for furin cleavage in this process remains controversial based on mouse studies.

Měrná jednotka: 1 * 100 µG

Akce

Dodavatel: Thermo Fisher Scientific

Popis: Germanium ≥99.9999% (metals basis) (N type ≥ 95%), ingot, zone refined 95% N type minimum

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Katalogové číslo: (CAMA034.1798)

Dodavatel: CAMAG

Popis: TLC precoated sheets, silica gel 60.

Měrná jednotka: 1 * 25 KS

Akce

Katalogové číslo: (PRSI26-808)

Dodavatel: ProSci Inc.

Popis: ACRV1 is a testis-specific, differentiation antigen, acrosomal vesicle protein 1, that arises within the acrosomal vesicle during spermatogenesis, and is associated with the acrosomal membranes and matrix of mature sperm. The acrosomal vesicle protein 1 may be involved in sperm-zona binding or penetration, and it is a potential contraceptive vaccine immunogen for humans. This gene encodes a testis-specific, differentiation antigen, acrosomal vesicle protein 1, that arises within the acrosomal vesicle during spermatogenesis, and is associated with the acrosomal membranes and matrix of mature sperm. This gene consists of 4 exons and its alternative splicing generates multiple distinct transcripts, which encode protein isoforms ranging from 81 to 265 amino acids. The longest transcript is the most abundant, comprising 53-72% of the total acrosomal vesicle protein 1 messages; the second largest transcript comprises 15-32%; the third and the fourth largest transcripts account for 3.4-8.3% and 8.7-12.5%, respectively; and the remaining transcripts combined account for < 1% of the total acrosomal vesicle protein 1 message. It is suggested that phenomena of cryptic splicing and exon skipping occur within this gene. The acrosomal vesicle protein 1 may be involved in sperm-zona binding or penetration, and it is a potential contraceptive vaccine immunogen for humans.

Měrná jednotka: 1 * 50 µG

Akce

Dodavatel: BURKLE

Popis: Guarantees precise zone sampling through all layers of the sample. The spiral arrangement of the sampling slits means that these are opened one after the other from bottom to top. In this way the lowest opening is filled first and then those above it in sequence until the complete Spiralus has been filled. The shape of the sampling slits prevents seeds from being cut up. The Spiralus provides an excellent all-layer sample.

Dodavatel: MACHEREY-NAGEL

Popis: Unmodified standard silica layers with concentrating zone for TLC.

Katalogové číslo: (VWRC109526.0005)

Dodavatel: VWR Chemicals

Popis: These rolls (4,8 m × 10 mm) have only 1 colour zone and are useful where high precision of measurement is not necessary.

Měrná jednotka: 1 * 5 KS

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Dodavatel: UVEX

Popis: Pěnová vložka 3D hydroflex® poskytuje chodidlu mimořádné, celoplošné tlumení nárazů. Další prvky pohlcující otřesy v patě a v přední části chodidla zajistí pohodlí ve vysoce deformačních zónách.

Dodavatel: MACHEREY-NAGEL

Popis: Unmodified HPTLC silica layers with concentrating zone for HPTLC.

Dodavatel: Merck

Popis: HPTLC plates, unmodified silica gel 60
This range of plates uses an optimised Merck silica gel 60 with a particle size of only 5 to 6 µm, which results in higher packing density and a smoother surface, therefore, reducing band diffusion. Less sample is required, 0,1 to 0,5 µl than for classic TLC.

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Katalogové číslo: (BELAH378290000)

Dodavatel: Bel-Art Products, a Part of SP

Popis: Three zone powder samplers.

Měrná jednotka: 1 * 1 KS

Akce

Dodavatel: BURKLE

Popis: Novartos Uno sampler with two or three sample chambers, for one sample zone.

Katalogové číslo: (391-1264)

Dodavatel: VWR Collection

Popis: S polyetylenovou vrchní vrstvou a inertní bílou polypropylenovou a akrylovou adhezivní spodní vrstvou umožňuje tato snadno propíchnutá těsnící fólie přímou izolaci vzorku pomocí jednokanálových nebo vícekanálových pipet a robotických sond.

Měrná jednotka: 1 * 50 KS

Akce

Dodavatel: Merck

Popis: Our NH₂, CN- and DIOL-modified silica sorbents are less polar then conventional silica phases, making them ideal for separating hydrophilic or charged substances. Our moderately polar cyano- and diol-modified silica plates can be used for both normal phase and reversed phase systems. An alternative to PEI cellulose, amino-modified NH₂ plates provide weak basic ion exchange characteristics with special selectivity for charged compounds.

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Dodavatel: Merck

Popis: PLC (Preparative Layer Chromatography) plates are based on the same proven Merck silica-binder technology as analytical TLC plates. Plates are available with layers of unmodified silica gel or RP-18 modified silica gel in several layer thicknesses, ranging from 500 to 2000 µm, with or without fluorescent indicator.

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