Neutrophil Antigen (FcγRIIIB) SH Gene Frequencies in Six Racial Groups

ABSTRACT During amino acid sequence studies of carbonic anhydrase (CA) III, purified from a pool of human skeletal muscles, an electrophoretically undetectable (silent) variation was found at residue 31 which was either valine and/or isoleucine. To distinguish a simple allelic polymorphism from more complex models involving gene duplication, 11 separate CA III samples were purified from individuals of different age and racial backgrounds. Peptide mapping by high performance liquid chromatography and sequencing indicated that four were homozygous for 31-Val, three homozygous for 31-Ile and four were apparent heterozygotes. Since the ratio of Val/Ile at residue 31 was approximately 1.0 in the heterozygotes, the present observations are consistent with a simple allelic polymorphism model. Despite the small sample size, there are preliminary indications that the gene frequencies may differ among racial groups. The finding of this silent allelic polymorphism together with the finding of an electrophoretically detectable polymorphism of CA II permits us to test the linkage of the CA II and CA III genes which appear to have been formed by gene dupliction more than 300 million years ago. The possibility that the Val/Ile variation may represent a neutral mutation is discussed.

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Milk protein polymorphisms in Brazilian Zebu cattle

Brazilian Journal of Genetics ◽

10.1590/s0100-84551997000400011 ◽

1997 ◽

Vol 20 (4) ◽

pp. 625-630 ◽

Cited By ~ 6

Author(s):

Ivana Tramontina da Silva ◽

Marco Antonio Del Lama

Keyword(s):

Milk Protein ◽

Bovine Milk ◽

Zebu Cattle ◽

Racial Groups ◽

Gene Frequencies ◽

Holstein Breed ◽

Minas Gerais State ◽

Taurine Breed ◽

Starch Gel ◽

Protein Polymorphisms

Five bovine milk protein polymorphisms were studied in Zebuine cattle raised in Brazil, through horizontal electrophoresis on starch gel containing urea and 2-mercaptoethanol, using basic and acidic buffer systems. Allelic frequencies for a-La, b-Lg, aS1-Cn, b-Cn and k-Cn loci were estimated in six Gyr herds (N = 283), six Guzerat herds (N = 205), one Nelore herd (N = 17) and one Sindi herd (N = 22), all from São Paulo or Minas Gerais State, Brazil. Genotypic frequencies observed for each locus and breed studied are in accordance with the assumption of genetic equilibrium, demonstrating absence of high inbreeding levels for the breeds tested. The FST value found indicated significant genetic differentiation among breeds; however, the Gyr and Guzerat herds showed significantly different gene frequencies. Genetic distance estimates among zebuine breeds studied and the Holstein breed, taken as a reference for a taurine breed, showed strong differences between these two racial groups

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Differences in Suicidal Thoughts and Behaviors Among Three Racial Groups

Crisis ◽

10.1027/0227-5910/a000621 ◽

2020 ◽

Vol 41 (3) ◽

pp. 172-178

Author(s):

Brooke A. Ammerman ◽

Martha K. Fahlgren ◽

Kristen M. Sorgi ◽

Michael S. McCloskey

Keyword(s):

Suicide Attempts ◽

Health Concern ◽

Future Research ◽

Racial Groups ◽

Contributing Factors ◽

Suicidal Thoughts ◽

Final Sample ◽

And Behaviors ◽

Assessment Procedures ◽

Suicidal Thoughts And Behaviors

Abstract. Background: Despite being a major public health concern, it is unclear how suicidal thoughts and behaviors differentially impact separate racial groups. Aims: The aim of the current study was to examine the occurrence of nonlethal suicide events, in addition to suicide attempt characteristics and factors contributing to suicide attempts. Method: A final sample of 7,094 undergraduates from a large northeastern university, identifying as members of three racial groups (White [67.30%], Black [17.30%], and Asian [15.40%]), completed online questionnaires. Results: White participants reported increased likelihood of endorsing lifetime suicidal ideation and plan, whereas Black participants reported decreased likelihood of these events; no differences were found in rates of lifetime suicide attempts. Black participants' suicidal behavior may involve greater ambivalence of intent. A higher proportion of Asian participants endorsed interpersonal factors as contributing to their suicide attempts, whereas a greater percentage of White participants reported internal contributing factors. Limitations: Findings are limited by the sample size and assessment of lifetime suicidal thoughts and behaviors. Conclusion: The findings present a more nuanced look at attitudes and actions related to suicidal thoughts and behaviors that may inform future research and risk assessment procedures.

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Seeing Similarity or Distance?

Social Psychology ◽

10.1027/1864-9335/a000168 ◽

2014 ◽

Vol 45 (2) ◽

pp. 127-134 ◽

Cited By ~ 6

Author(s):

Leigh Wilton ◽

Diana T. Sanchez ◽

Lisa Giamo

Keyword(s):

Social Distance ◽

Mixed Race ◽

Racial Groups ◽

Perceived Similarity ◽

The Social ◽

Intergroup Perception ◽

Intergroup Perceptions ◽

Racially Ambiguous ◽

Ambiguous Faces

Biracial individuals threaten the distinctiveness of racial groups because they have mixed-race ancestry, but recent findings suggest that exposure to biracial-labeled, racially ambiguous faces may positively influence intergroup perception by reducing essentialist thinking among Whites ( Young, Sanchez, & Wilton, 2013 ). However, biracial exposure may not lead to positive intergroup perceptions for Whites who are highly racially identified and thus motivated to preserve the social distance between racial groups. We exposed Whites to racially ambiguous Asian/White biracial faces and measured the perceived similarity between Asians and Whites. We found that exposure to racially ambiguous, biracial-labeled targets may improve perceptions of intergroup similarity, but only for Whites who are less racially identified. Results are discussed in terms of motivated intergroup perception.

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