| nocturnal increase in pineal melatonin production in two lemming species, dicrostonyx hudsonius and d. groenlandicus. | pineal n-acetyltransferase (nat) activity and melatonin levels and thyroxine 5'-deiodinase (5'd) activity in brown adipose tissue (bat) were compared during the day and night in two species of lemmings, dicrostonyx hudsonius and d. groenlandicus. in both species, nat and melatonin exhibited significant night-time increases in the pineal gland. thyroxine 5'd activity in bat did not show a statistically significant day-night difference in either species of lemming, suggesting the night-time rise i ... | 1990 | 2191892 |
| complete mitochondrial genomes of the north american collared lemmings dicrostonyx groenlandicus traill, 1823 and dicrostonyx hudsonius pallas, 1778 (rodentia: arvicolinae). | the complete mitochondrial genomes of two species of the north american collared lemmings were obtained by using pcr amplification and capillary sequencing (genbank accession nos. kx712239 and kx683880). the collared lemming mitochondrial genomes are 16,341 and 16,338 base pairs long and show the gene order, contents and gene strand asymmetry typical for mammals. the mitogenome sequences provide an important genomic resource for the collared lemmings, which are model study species in arctic gene ... | 2016 | 28642935 |