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Chromosomal “bouquet” stage, V. berus spermatocyte I. Detection of the heterochromatin regions on the both chromosomes 6 before synapsis (HR6(I) and HR6(II)). (a) Chromatin stained with DAPI (blue), (b) Axial elements of chromosomes are immunostained with antibodies against the SYCP3 protein (green), and (c) merge. Bar—10 μm.
