17 research outputs found

    Axially Chiral Macrocyclic <i>E</i>-Alkene Bearing Bisazole Component Formed by Sequential C–H Homocoupling and Ring-Closing Metathesis

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    Clipping by ring-closing metathesis freezes rotation of a C–C bond to result in forming axial chirality. Treatment of bisbenzimidazole bearing an <i>N</i>-(3-butenyl) substituent with a Grubbs’ catalyst undergoes ring-closing metathesis, in which the stereochemistry of the thus formed olefin was exclusively <i>E</i>-form. Analysis by HPLC with a chiral stationary column confirmed clear baseline separation of each enantiomer

    Expression of tilapia CREBs during: (A) natural ovarian cycle and (B) hCG induced -oocyte maturation as determined by RT-PCR and Northern Blot respectively. A plasmid DNA with CREB partial cDNA was used as positive control (PC) and PCR reaction without RT was used as negative control (NC) (Ma, Marker). (C) Densitometric analysis of CREB2 and CREB3 (mean ±SEM of two independent experiments).

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    <p>Expression of tilapia CREBs during: (A) natural ovarian cycle and (B) hCG induced -oocyte maturation as determined by RT-PCR and Northern Blot respectively. A plasmid DNA with CREB partial cDNA was used as positive control (PC) and PCR reaction without RT was used as negative control (NC) (Ma, Marker). (C) Densitometric analysis of CREB2 and CREB3 (mean ±SEM of two independent experiments).</p

    Cladogram showing phylogenetic analysis of the Nile tilapia and catfish CREBs with other vertebrate analogs.

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    <p>(Accession no.: Human A <u>NM_004379</u>; Human B <u>NM_134442</u>; Mouse C <u>NM_001037726</u>; <i>Xenopus</i><u>NM_001086603</u>;Mouse A <u>NM_009952</u>; Mouse B <u>NM_133828</u>; <u>Rat A NM_ 134443</u>; Rat B <u>NM_031017</u>; Chicken <u>NM_ 204450</u>; Zebrafish <u>NM_ 200909</u>; Pig <u>NM_001099929</u>; Cattle <u>NM_174285</u>; Songbird <u>NM_001048256</u>).</p

    Northern blot analysis of CREBs.

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    <p><b>(A)</b> Expression of CREBs in tilapia ovary and testis <b>(</b>VOF; Vitellogenic Ovarian Follicle; FIO, Full grown Immature Ovarian Follicle; MOF, Mature Ovarian follicle). <b>(B)</b> Representative densitometric analysis of CREB2 and CREB3 of tilapia. Bars depicting same letter are significantly different from each other (mean ±SEM of two independent experiments). <b>(C)</b> Northern blot analysis of CREBs catfish ovary <b>(</b>P, Preparatory; PS, Pre-spawning; S, Spawning). <i>Note</i>: only one form of CREB (~ 1.3 kb) in tilapia testis [CREB 1] while two forms of CREB (~2.85 [CREB 2] and ~2.75 kb [CREB 3]) in tilapia ovary.</p

    Tissue distribution pattern of tilapia CREBs as determined by semi-quantitative RT-PCR.

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    <p>A plasmid DNA of CREB partial cDNA was used as positive control (PC) and PCR reaction without RT was used as negative control (NC). (Ma, Marker; B, Brain; A, Adrenal; H, Heart; S, Spleen; L, Lung; I, Intestine; K, Kidney; M, Muscle; T, Testis; O, Ovary; F, Ovarian follicle).</p
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