Çekirdek zarı

İnsan hücresi çekirdeği

Çekirdek zarı, ökaryotik hücrelerde genetik materyali çevreleyen çekirdeği çevreleyen iki çift tabakalı lipit zardan oluşan bir zardır.

Çekirdek zarı, iki lipit çift tabakalı zardan, bir iç çekirdek zar ve bir dış çekirdek zarından oluşur. Zarlar arasındaki boşluğa perinükleer boşluk denir. Genellikle yaklaşık 20-40 nm genişliğindedir.[1] Dış çekirdek zarı, endoplazmik retikulum membranı ile süreklidir.[2] Çekirdek zarı, materyallerin sitozol ve çekirdek arasında hareket etmesine izin veren birçok çekirdek gözeneğe sahiptir. Laminası adı verilen ara filament proteinleri, iç nükleer membranın iç kısmında çekirdek laminası adı verilen bir yapı oluşturur ve çekirdeğe yapısal destek verir.[2]

Kaynakça

  1. ^ "Perinuclear space". Dictionary. Biology Online. 11 Nisan 2013 tarihinde kaynağından arşivlendi. Erişim tarihi: 9 Eylül 2020. 
  2. ^ a b {{kitap kaynağı|soyadı1=Alberts|ad1=Bruce|başlık=Molecular biology of the cell|url=https://archive.org/details/molecularbiology00albe_540%7Ctarih=2002%7Cyayımcı=Garland%7Cyer=New York [u.a.]|isbn=978-0815340720|sayfa=197|basım=4.4

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