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ECB-ART-36519
Biochem Biophys Res Commun 1996 Dec 13;2292:511-7. doi: 10.1006/bbrc.1996.1835.
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"BEP" RNAs and proteins are situated in the animal side of sea urchin unfertilized egg, which can be recognized by female pronuclear localization.

Di Carlo M , Romancino DP , Ortolani G , Montana G , Giudice G .


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Microsurgery experiments demonstrate that the animal side of the unfertilized sea urchin Paracentrotus lividus egg coincides with the side of the egg pronucleus location. It is demonstrated by means of in situ hybridization and immunostaining of whole mounts of animal or vegetal halves that the previously identified bep 1 and bep4 RNAs and their proteins are located in the animal part of the unfertilized egg and much less in the vegetal part. The addition of Fabs against BEP1 and BEP4 causes exogastrulation.

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Genes referenced: LOC100887844