Related Experiment Video
Updated: Nov 20, 2025

10:07
Isolation of Giant Lampbrush Chromosomes from Living Oocytes of Frogs and Salamanders
Published on: December 5, 2016
13.3K
Complete mitochondrial genome of the Southern two-lined salamanders (Eurycea cirrigera)
XingRan Wang1, Junkui Li2, LiNa Zhang1
1College of Animal Science and Technology, Northeast Agricultural University, Harbin, P.R. China.
Mitochondrial DNA. Part B, Resources
|January 21, 2021
Abstract:
The complete mitochondrial genome of the southern two-lined salamanders (Eurycea cirrigera) was determined in this study. The complete mitogenome sequence of E. cirrigera is 16,759bp in length and contains 37 genes (13 protein coding genes (PGCs), two ribosomal RNA, 22 transfer RNA genes and one control region). This is the first time of the mitochondrial genome sequencing for E. cirrigera.
Related Concept Videos
Animal Mitochondrial Genetics
8.5K
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
8.5K
Lampbrush Chromosomes
8.3K
In 1882, Flemming observed lampbrush chromosomes (LBC) in salamander eggs. Later in 1892, Rückert observed LBCs in shark egg cells and coined the term "lampbrush chromosomes" because they looked like brushes used to clean kerosene lamps.
LBCs are made up of two pairs of conjugating homologous chromatids. Each chromatid consists of alternatively positioned regions of condensed-inactive chromatin and loosely placed-active side loops, which can be contracted and extended. The loops...
LBCs are made up of two pairs of conjugating homologous chromatids. Each chromatid consists of alternatively positioned regions of condensed-inactive chromatin and loosely placed-active side loops, which can be contracted and extended. The loops...
8.3K

