Heterochromatin distribution and structure inGymnothorax unicolor(Anguilliformes, Muraenidae)

Patterns of heterochromatin distribution in plant chromosomes

Understanding Higher Order Heterochromatin Structure And Its Determinants

Heterochromatin is a higher order unique compacted chromatin structure present at the centromeres and the telomeres of chromosomes. It is characterized by the methylation of histone H3 on lysine 9 and the binding of a key structural and functional protein called heterochromatin protein 1 (HP1) to that histone mark. The structural determinants for such binding were not clear. In this study, we s...

Ring-Like Distribution of Constitutive Heterochromatin in Bovine Senescent Cells

BACKGROUND Cells that reach "Hayflick limit" of proliferation, known as senescent cells, possess a particular type of nuclear architecture. Human senescent cells are characterized by the presence of highly condensed senescent associated heterochromatin foci (SAHF) that can be detected both by immunostaining for histone H3 three-methylated at lysine 9 (H3K9me3) and by DAPI counterstaining. MET...

Development and Resources Distribution Structure in Political Systems

Distribution and allocation of resources is affected by factors such as values, norms, social stratifications, ideology, information, coercion, political challenges, and even external factors. This finding means that there is always a fundamental tendency to redirect resources toward political goals instead of public interests and development. Because the resource structure is strongly influenc...

the underlying structure of language proficiency and the proficiency level

هدف از انجام این تخقیق بررسی رابطه احتمالی بین سطح مهارت زبان خارجی (foreign language proficiency) و ساختار مهارت زبان خارجی بود. تعداد 314 زبان آموز مونث و مذکر که عمدتا دانشجویان رشته های زبان انگلیسی در سطوح کارشناسی و کارشناسی ارشد بودند در این تحقیق شرکت کردند. از لحاظ سطح مهارت زبان خارجی شرکت کنندگان بسیار با هم متفاوت بودند، (75 نفر سطح پیشرفته، 113 نفر سطح متوسط، 126 سطح مقدماتی). کلا ...