Expression of heparan sulfate (HS) 3-O-sulfotransferases (3-OST) genes during early zebrafish development. A-C: Expression of 3-OST-1 is ubiquitous in 2 cell (A), 7 somite (B), and 18 somite (C) embryos. D-F: Expression of 3-OST-3X in 2 cell (D), 13 somite (E), and 18 somite (F) embryos. G-I: Expression of 3-OST-3Z in 2 cell (G), 7 somite (H), and 18 somite (I) embryos. J-L: Expression of 3-OST-4 in 2 cell (J), 5 somite (K), and 18 somite (L) embryos. M-O: Expression of 3-OST-5 in 2 cell (M), 7 somite (N), and 18 somite (O) embryos. P-R: Expression of 3-OST-6 in 2 cell (P), 13 somite (Q), and 18 somite (R) embryos. FB, forebrain; HB, hindbrain; LPM, lateral plate mesoderm; MB, midbrain; NT, neural tube; PND, pronephric duct; S, somites; SC, spinal cord; SCN, spinal cord neurons; TB, tail bud.
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