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Movements, leaders, victories and the continuing fight for equality.
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Katherine Johnson’s mathematical calculations helped guide some of America’s most important early space missions while she confronted the racial and gender barriers faced by Black women in twentieth-century America.
MORE →Reflects the personal views, recollections, and perspective of the author, Mike Davis.
This is a personal recollection on the Move fire on May 13, 1985
| DNA polymerase III, subunits beta and tau | |||||||
|---|---|---|---|---|---|---|---|
| Identifiers | |||||||
| Symbol | dnaH | ||||||
| NCBI gene | 1115872 | ||||||
| UniProt | Q9CDM5 | ||||||
| Other data | |||||||
| EC number | 2.7.7.7 | ||||||
| |||||||
dnaH is a gene involved in DNA replication.[1]
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dnaH is a gene involved in DNA replication.
Ishoʿdnaḥ (Syriac: ܝܫܘܥܕܢܚ; fl. 9th century) was a historian and hagiographer of the Church of the East who served as the metropolitan bishop of Mayshan at Baṣra. Some manuscripts refer to him as metropolitan of the diocese of Qasra, but this appears to be a simple spelling error, since Qasra was never a metropolitan see. Ishoʿdnaḥ wrote in Syriac. According to ʿAbdishoʿ bar Brikha, writing towards 1300, he wrote a three-volume ecclesiastical history, a treatise on logic, hymns, poems and consolations, as well as "a treatise on chastity, in which he collected an account of all the saints." The last is one of only two works by Ishoʿdnaḥ known to have been preserved. The other is an acrostic poem about Mar Yawnan, the founder of a monastery near al-Anbār, in 22 stanzas. The former has been published in full, but only a few stanzas of the latter. The Ktābā d-nakputā ("Book of Chastity"), also known by its Latin title, Liber castitatis, was written around 860. It contains 140 brief biographical notices of ascetic saints, mostly the founders of monasteries in northern Mesopotamia in the late Sasanian and early Arab periods, between about 580 and 660. The earliest is Mar Awgen of the 4th century, while the latest is from the mid-9th century. The latest event he refers to is the translation of the monk Ishoʿzka in "the third year of Jaʿfar, son of Muʿtaṣim, king of the Arabs [Ṭayyāyē]", that is, 849–850. Although several manuscript copies now exist, all derive from a single late 19th-century copy. It is untitled in the manuscripts. Its conventional title is taken from ʿAbdishoʿ. In the heading identifying Ishoʿdnaḥ as the author, the scribe notes that he "write[s] the stories in brief of all those fathers who founded convents in the kingdom of the Persians and Arabs", which may indicate either that the notices he was copying were brief or perhaps that he (i.e., the copyist) was abridging them. It is possible, therefore, that the work which survives is an abridgement. The existing text also omits some Jacobite founders known from descriptions of the work to have been part of the original. Ishoʿdnaḥ's lost ecclesiastical history was written around 850. Elias of Nisibis cites it seventeen times, but for no event earlier than 624 or later than 714. Among the events he is known to have recorded are the death of Shah Khusrau II and the accession of Kavad II (628); ʿUmar's capture of Jerusalem (637); the death of the Emperor Heraclonas and the accession of Constans II (641); Muʿāwiya I's initiation of naval warfare against Byzantium (647); the first Arab civil war (656–661); Constans II's campaign against the Slavs in 660; and Constans II's murder of his brother Theodosius that same year. The Jacobite historians Michael Rabo and Bar Hebraeus cite an otherwise unknown Dnaḥ Ishoʿ the Nestorian for an event of 793, and this may be a garbled reference to Ishoʿdnaḥ. Pierre Nautin proposed that Ishoʿdnaḥ was the author of the anonymous Arabic Chronicle of Siirt. Jean Maurice Fiey suggests, however, that they author of the Chronicle merely had access to some of the same sources as Ishoʿdnaḥ. Robert Hoyland considers it unlikely that Ishoʿdnaḥ lived long enough into the 10th century to have completed the Chronicle of Siirt. The most likely place for Ishoʿdnaḥ in the list of known metropolitans of Baṣra is between Daniel (853) and Gabriel (884), although it is possible that he reigned earlier, his pontificate ending between 849 and 853.
Sesar is a village in the Bagh District of Azad Kashmir. It is located in Dheerkot tehsil. It was affected by the 2005 earthquake and also hosted large numbers of refugees. Sesar was granted the status of a Union Council in 2018 by the Land and Revenue Department of Azad Jammu & Kashmir. It is now known as Union Council Sesar Kals and comprises four revenue villages: Sesar, Dnah, Kals Pajjay, and Neela Butt. Basharat Abbasi Shaheed Road connects Saser with the capital of Azad Jammu & Kashmir, Muzaffarabad, as well as the capital of Pakistan, Islamabad. The village has two government high schools, one for girls and one for boys, along with a READ Foundation school. Overall, the literacy rate is quite high, with many being well educated and actively serving in various public and social sectors. Additionally, a significant portion of the population is employed abroad. A Rural Health Center exists in the village, established through the dedicated efforts and keen interest of the late. Dr. Muhammad Hayat Khan Abbasi. He was a renowned and respected personality of the village who made a significant contribution to its development. He completed his MBBS in 1935, before the partition, from Amritsar Medical College, and became the 1st Muslim doctor of Poonch. After the partition, he devoted himself to serving the people of Azad Jammu & Kashmir and played a key role in the establishment of the Health Department in the state.
DNA replication is the process by which a cell makes exact copies of its DNA. This process occurs in all organisms and is essential to biological inheritance, cell division, and repair of damaged tissues. DNA replication ensures that each of the newly divided daughter cells receives its own copy of each DNA molecule. DNA most commonly occurs in double-stranded form, made up of two complementary strands held together by base pairing of the nucleotides comprising each strand. The two linear strands of a double-stranded DNA molecule typically twist together in the shape of a double helix. During replication, the two strands are separated, and each strand of the original DNA molecule then serves as a template for the production of a complementary counterpart strand, a process referred to as semiconservative replication. As a result, each replicated DNA molecule is composed of one original DNA strand as well as one newly synthesized strand. Cellular proofreading and error-checking mechanisms ensure near-perfect fidelity for DNA replication. DNA replication usually begins at specific locations known as origins of replication which are scattered across the genome. Unwinding of DNA at the origin is accommodated by enzymes known as helicases and results in replication forks growing bi-directionally from the origin. Numerous proteins are associated with the replication fork to help in the initiation and continuation of DNA synthesis. Most prominently, DNA polymerase synthesizes the new strands by incorporating nucleotides that complement the nucleotides of the template strand. DNA replication occurs during the S (synthesis) stage of interphase. DNA replication can also be performed in vitro (artificially, outside a cell). DNA polymerases isolated from cells and artificial DNA primers can be used to start DNA synthesis at known sequences in a template DNA molecule. Polymerase chain reaction (PCR), ligase chain reaction (LCR), and transcription-mediated amplification (TMA) are all common examples of this technique. In March 2021, researchers reported evidence suggesting that a preliminary form of transfer RNA, a necessary component of translation (the biological synthesis of new proteins in accordance with the genetic code), could have been a replicator molecule itself in the early abiogenesis of primordial life.
Before the 1921 destruction of Tulsa’s Greenwood District, Black residents had created a remarkable center of business and community life. The district included stores, professional offices, entertainment venues and homes owned by Black citizens. Understanding Greenwood means learning what was built—not only what was burned.
MORE →Madam C.J. Walker
