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1.
Figure 5.

Figure 5. From: Analysis of thrombocyte development in CD41-GFP transgenic zebrafish.

Two-color whole-mount in situ hybridization. (A) CD41 expression does not colocalize with MPO, as judged by the CD41 cells (purple) that do not turn red in the in situ result. (B) On the contrary, the coexpression of CD41 and GFP is supported by the red color (GFP) outcome of originally purple cells (CD41). (C) In addition, coexpression of c-mpl and GFP in the same cells is supported.

Hui-Feng Lin, et al. Blood. 2005 December 1;106(12):3803-3810.
2.
Figure 1.

Figure 1. From: Analysis of thrombocyte development in CD41-GFP transgenic zebrafish.

Alignment of deduced CD41 protein sequence. Alignment of the deduced amino acid sequences of the human (hcd41), mouse (mcd41), rat (rcd41), and zebrafish (zcd41) CD41 is shown. Forty percent of the zebrafish sequence is identical to the sequences of the other three species. There are some conserved features, including the location of cysteine residues, the four potential calcium-binding domains (underlined), and the C-terminal GFFKR sequence (underlined with arrow). The regions of sequence identity in the four species are shaded.

Hui-Feng Lin, et al. Blood. 2005 December 1;106(12):3803-3810.
3.
Figure 3.

Figure 3. From: Analysis of thrombocyte development in CD41-GFP transgenic zebrafish.

Expression of GFP in the CD41-GFP embryos. Photomicrographs showing CD41-GFP+ expression in transgenic embryos are presented. Unfertilized eggs from homozygous (A) and wild-type (B) females demonstrate the maternally derived GFP. At 48 hpf, bright CD41-GFP+ cells are detected in the region between dorsal aorta and caudal vein (arrows, C) and cardiac sinus/yolk sac (arrow near yolk). By 3 dpf, increasing numbers of CD41-GFP+ cells are detected in a similar region (arrows near tail, D), and the cardiac sinus/yolk sac (arrow near yolk), as well as in the circulation (D). By 5 dpf, the majority of the CD41-GFP+ cells are circulating, and a collection of CD41-GFP+ cells appears near the developing mesonephros (arrow, E).

Hui-Feng Lin, et al. Blood. 2005 December 1;106(12):3803-3810.
4.
Figure 6.

Figure 6. From: Analysis of thrombocyte development in CD41-GFP transgenic zebrafish.

Results of FACS analyses. (A) Panel i shows 2 populations of GFP+ cells (CD41low and CD41high representing 0.81% and 0.79% of WKM, respectively) that are detected in the kidney. CD41low cells (ii) are predominantly large prothrombocytic cells and CD41high cells (iii) are differentiated thrombocytes as demonstrated by the corresponding Wright-Giemsa staining of flow-sorted cells shown in panels iv and v (see “Flow sorting of GFP+ thrombocytes”). A representative erythrocyte is placed at the top right corner for comparison. By contrast, the vast majority of cells isolated from peripheral blood (B) and spleen (C) are CD41high (0.64% and 4.21%, respectively) and display the mature thrombocyte morphology.

Hui-Feng Lin, et al. Blood. 2005 December 1;106(12):3803-3810.
5.
Figure 7.

Figure 7. From: Analysis of thrombocyte development in CD41-GFP transgenic zebrafish.

Results of whole-mount in situ hybridization of c-mpl and c-mpl and scl morpholino injection. Shown are the results of whole-mount in situ hybridization with antisense c-mpl cRNA (A; high power, B) at the embryo 3 dpf. c-mpl+ cells are detected in the same location as CD41+ and GFP+ cells detected in previous studies. Injection of a zebrafish c-mpl antisense morpholino (MOc) reduced the number of GFP+ cells 3 and 5 dpf. c-mpl morphants have some residual GFP+ cells. Injection of an inverted morpholino (MOinv) did not decrease the number of circulating GFP+ cells. Injection of 2 scl morpholinos (MOs) also reduced the number of GFP+ cells in the morphants at 4 dpf, in addition to causing tail deformation. For comparison, uninjected siblings of the same developmental stages are posted in the right corner of each picture.

Hui-Feng Lin, et al. Blood. 2005 December 1;106(12):3803-3810.
6.
Figure 4.

Figure 4. From: Analysis of thrombocyte development in CD41-GFP transgenic zebrafish.

Confocal scanning microscopy of CD41-GFP/LMO2-dsRed embryos. Shown are 2-dimensional photomicrographs of confocal microscopy near the trunk and caudal portion of an embryo 48 hpf. Two corresponding movies of 3-dimensional reconstructions of the same embryo are available as supplemental material on the Blood website; click on the Supplemental Movies link at the top of the online article. Of note is that the major vessels, whose endothelial cells are tagged with LMO2-dsRed, emit red fluorescence, and the nonmobile CD41-GFP+ cells emit green fluorescence. The GFP+ cells are extravascular and are clearly located in the region between the dorsal aorta and the posterior cardinal vein (trunk view, arrow) and caudal portion between the caudal dorsal aorta and caudal vein (caudal view, arrow). DA indicates dorsal aorta; PCV, posterior cardinal vein; ISV, intersomitic vessel; YE, yolk extension; and CV, caudal vein.

Hui-Feng Lin, et al. Blood. 2005 December 1;106(12):3803-3810.
7.
Figure 2.

Figure 2. From: Analysis of thrombocyte development in CD41-GFP transgenic zebrafish.

Results of RT-PCR and whole-mount in situ hybridization of CD41. (A) Shown is the analysis of the expression of CD41 mRNA in developing zebrafish embryos by RT-PCR. The CD41 transcript is first detected at 42 hpf. Dilutions (10 ×, 100 ×, and 1000 ×) of the cDNA preparation 2 dpf, with EF-1α as a control, indicated that CD41 transcript is at least 1000 × lower than EF-1α transcript. The expected PCR product for CD41 is 1237 bp and for EF-1α is 220 bp. (B-D) Shown also are results of whole-mount in situ hybridization of wild-type zebrafish embryos with zebrafish CD41 antisense cRNA. (B) In embryos 2 dpf, punctate purple CD41+ cells are present in the ventral region of the dorsal aorta. (C) In embryos 3 dpf, the number of CD41+ cells has increased and they appear in the circulation. (D) In embryos 5 dpf, more CD41+ cells are present in the circulation. The CD41 transcript is not detected in the spadetail (E) and cloche (F) embryos 3 dpf.

Hui-Feng Lin, et al. Blood. 2005 December 1;106(12):3803-3810.

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