Yolk granules. Coloured scanning electron micrograph (SEM) of yolk granules (green) in an extract of cytoplasm taken from a frog (Xenopus sp.) oocyte (egg). Yolk granules are storage bodies for a type of lipoprotein called vitellin,which nourishes the embryo during the first stages of development. The blue structures are endoplasmic reticulum (ER) vesicles. The ER is a membrane-bound cell organelle that is the site of lipid synthesis and the production of membrane- bound proteins | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Kiseleva, Dr. Elena |
Bildgröße: | 4722 px × 3622 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |