The synthesis of hemoglobin in a cell-free system

The microsomal particles (1) have been implicated as the major sites of protein synthesis within the cells of a variety of tissues. The studies of Borsook, Zamecnik, Hultin, and others, with intact animals and various types of whole cell systems (see review by Askonas et al. (2)), as well as electron-microscope studies (3), provided the original evidence for this conclusion. Zamecnik and Keller (4) have, in addition, developed cell-free systems which incorporate C14-labeled amino acids into protein. These include microsomes as well as various soluble enzymes (5). Further studies have partially defined the intermediate stages involved (6). However, it has not yet been possible to equate incorporation of labeled amino acid into protein with actual protein synthesis (see review by Campbell (7))

Conditions and reactions defining dye bacteriostasis

The continued study of bacterial cells from the point of view which assumes that they behave as conjugated proteins (Stearn and Stearn, 1924a and b) has led to an intensive study of the action of both basic and acid dyes in their bacteriostatic and staining reactions

The Talent Survey in Our Music School

The forty-six students who are majoring in music have been given a series of psychological tests during the year 1919-1920. The tests for sense of pitch, sense of intensity, sense of time, sense of consonance, and tonal memory were given not only to those majoring in music, but also to the large groups in harmony and history of music, by means of the phonograph disks. The large groups were also given the army intelligence test and the auditory imagery group test

Exercises to develop reading comprehension in grade eight

Thesis (Ed.M.)--Boston Universit

Dealing with disclosure: Perspectives from HIV-positive children and their older carers living in rural south-western Uganda.

There are limited data on the challenges faced by carers, in particular older carers, in managing the difficult task of status disclosure for HIV-positive children. We report findings from qualitative interviews with 18 care dyads of older people and HIV-positive children living in rural south-western Uganda. Our data provide insights into perceptions and norms influencing communication during and following disclosure among both carers and children, including those shaped by gendered expectations of girls' and boys' sexual behaviour. Young participants reported several advantages of knowing their status and showed considerable resilience in the face of HIV disclosure. Better and more support is needed to help health workers and carers (particularly older carers) manage cross-generational communication around HIV disclosure and other related aspects of sexual and reproductive health as critical aspects of children's psychosocial development and well-being

Characterization of the ABC methionine transporter from Neisseria meningitidis reveals that MetQ is a lipoprotein

NmMetQ is a substrate binding protein (SBP) from Neisseria meningitidis that has been identified as a surface-exposed candidate antigen for meningococcal vaccines. However, this location for NmMetQ challenges the prevailing view that SBPs in Gram-negative bacteria are localized to the periplasmic space to promote interaction with their cognate ABC transporter embedded in the bacterial inner membrane. To address the roles of NmMetQ, we characterized NmMetQ with and without its cognate ABC transporter (NmMetNI). Here, we show that NmMetQ is a lipoprotein (lipo-NmMetQ) that binds multiple methionine analogs and stimulates the ATPase activity of NmMetNI. Using single-particle electron cryo-microscopy, we determined the structures of NmMetNI in the absence and presence of lipo-NmMetQ. Based on our data, we propose that NmMetQ tethers to membranes via a lipid anchor and has dual function/topology, playing a role in NmMetNI-mediated transport at the inner-membrane in addition to moonlighting functions on the bacterial surface

Diversity in conserved genes in tomato

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