J Constans
Biographic Data
| ID | 1343008 |
|---|---|
| NAME | J Constans |
| GIVEN NAMES | J |
| FAMILY NAME | Constans |
| SIGNATURE | CONSTANS J |
| AFFILIATIONS | Centre National de la Recherche Scientifique |
| ORCID | 0000-0002-0634-6024 |
| VERIFIED | Yes |
| TOTAL WORKS | 13 |
| TOTAL CITATIONS | 25 |
| AUTHOR COUNT | 13 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1980 |
| LATEST PUBLICATION YEAR | 1993 |
| H-INDEX | 4 |
Gm haplotype distribution in Amerindians
A review is made of the Gm haplotype distribution in 60 groups of Eskimos, North, Central and South American Indians, totaling 22,808 individuals. Differences were observed in the shapes of the distribution of Gm*ag and the other markers. Nearly identical values for F ST and average heterozygosities were obtained in the North+Central/South comparisons. North‐South and Southwest/Northeast clinal differences were observed in the Americas using corr…
A new cathodal Gc variant in Australia
A new cathodal Gc variant and a known rare variant were found in a study of 307 Australian caucasian blood donors, each with a gene frequency of 0·28%. The frequencies of the other alleles were 0·161 (Gc1F), 0·557 (Gc1S) and 0·279 (Gc2), and were comparable with those of two earlier surveys.ZusammenfassungEine neue kathodale Gc-Variante und eine bekannte seltene Variente wurden in einer Untersuchung von 307 europiden australischen Blutspendern ge…
Blood markers and genetic evolution in Cercopithecinae
DNA and protein polymorphism
In this paper, the author analyses the different approaches of the DNA polymorphism. Mitochondrial DNA, RFLP haplotypes associated with serum protein polymorphism, variability of some small regions of the genome detected by minisatellite probes are now well developed and often adapted to population analysis. The data gathered are used to build phylogenic or genealogic trees. Despite the limited number sampled in these investigations, it is obviou…
Polymorphism of the vitamin D binding protein (DBP) among primates
The distribution of the DBP (vitamin D binding protein) polymorphism is now well characterized among human populations but for primates only limited results are known. The aim of this paper is to describe the electrophoretic polymorphism of this protein among various species. Using three different electrophoretic methods, we are able to detect an unknown polymorphism and to classify the different alleles observed. These results may be used to set…
Isoelectric focusing studies of transferrin and haptoglobin subtypes in an Australian white population
This investigation presents the results of Hp and Tf subtyping of sera from 307 Australian whites by means of isoelectric focusing. Five Hp alleles were detected, these being Hp1F = 0.168, Hp1S = 0.235, Hp2FF = 0.003, Hp2FS = 0.561 and Hp2SS = 0.033. In the Tf system six alleles were found, TfC1 = 0.761, TfC2 = 0.176, TfC3 = 0.054, TfC6 = 0.002, TfB = 0.006 and TfD = 0.002. The usefulness of IEF together with modifications was highlighted for dif…
Gene flow across tribal barriers and its effect among the Amazonian Içana river Indians
Demographic information was obtained from 622 individuals of five communities of primarily Baniwa Amerindians living near the Içana river in Brazil. Four of these populations, plus another from the same area, were also studied genetically. The latter investigation included the blood and, in some cases, saliva of 531 subjects, variously tested in relation to 40 genetic systems. Demographically these groups are characterized by young age, high inte…
Group-specific component (Gc) subtypes in Gambian and Transkeian populations
A total of 270 serum specimens from Keneba and Manduar villages of The Gambia and 126 from Bantu of Transkei were examined for the group-specific component (Gc) phenotypes by isoelectric focusing. Only one individual showed phenotype 2-2 in the Bantu population, and the sub-allele frequencies showed a distribution very characteristic of African populations. A new rare mutation, Gc1C34, was found in heterozygous combination with Gc2 allele. The sy…
Population structure and blood genetics of the Pacaás Novos Indians of Brazil
Two communities of relatively recently contacted Brazilian Indians, the Pacaás Novos, have been studied in relation to several demographic parameters and 28 genetic systems. The age and sex distribution, fertility and mortality patterns were not very distinct in the two populations, but they differed markedly in relation to the mating, migration and genetic data (six of the 19 variable loci showed differences higher than 10%). This was interprete…
Population distribution of the human vitamin D binding protein
The polymorphism of the serum vitamin D binding protein (DBP) in humans is based on the existence of three common alleles, Gc 1F , Gc 1S , and Gc 2 , and 84 rare alleles. The geographical distribution of Gc 1F , Gc 1S , and Gc 2 alleles shows north to south clines, together with a balanced equilibrium between the Gc 1F or Gc 1S allele frequency and the Gc 2 frequency. The distribution of the F ST values shows high variability within a geographica…
New studies on the Macushi Indians of northern Brazil
Demographic data and genetic information concerning 40 genetic systems are reported for three populations of Macushi Indians, and have been compared to those already obtained for three other communities of this tribe. These are young populations (mean age, 19 years), with a low sex ratio (90), low percentages of non-Indian ancestry (1-2%) and of marriages between locally born persons (34). Intertribal unions (14%) are less frequent than among the…
Gc (vitamin D binding protein) subtype polymorphism and variants distribution among Saharan, Middle East, and African populations
This article presents the results obtained by electrophoretic analysis of the group specific component polymorphism in more than 1,250 serum samples from populations living in the Sahara, the Middle East, and equatorial Africa. In addition to the alleles Gc IF and Gc IS , five variants, including one previously unknown, were found. The distribution of the alleles herein described permits speculation on exchanges and relation among the groups cons…
Gc and transferrin isoelectrofocusing subtypes among Brazilian Indians
Gm haplotype distribution in Amerindians
A review is made of the Gm haplotype distribution in 60 groups of Eskimos, North, Central and South American Indians, totaling 22,808 individuals. Differences were observed in the shapes of the distribution of Gm*ag and the other markers. Nearly identical values for F ST and average heterozygosities were obtained in the North+Central/South comparisons. North‐South and Southwest/Northeast clinal differences were observed in the Americas using corr…
Population distribution of the human vitamin D binding protein
The polymorphism of the serum vitamin D binding protein (DBP) in humans is based on the existence of three common alleles, Gc 1F , Gc 1S , and Gc 2 , and 84 rare alleles. The geographical distribution of Gc 1F , Gc 1S , and Gc 2 alleles shows north to south clines, together with a balanced equilibrium between the Gc 1F or Gc 1S allele frequency and the Gc 2 frequency. The distribution of the F ST values shows high variability within a geographica…
Gene flow across tribal barriers and its effect among the Amazonian Içana river Indians
Demographic information was obtained from 622 individuals of five communities of primarily Baniwa Amerindians living near the Içana river in Brazil. Four of these populations, plus another from the same area, were also studied genetically. The latter investigation included the blood and, in some cases, saliva of 531 subjects, variously tested in relation to 40 genetic systems. Demographically these groups are characterized by young age, high inte…
Gc and transferrin isoelectrofocusing subtypes among Brazilian Indians
Gc (vitamin D binding protein) subtype polymorphism and variants distribution among Saharan, Middle East, and African populations
This article presents the results obtained by electrophoretic analysis of the group specific component polymorphism in more than 1,250 serum samples from populations living in the Sahara, the Middle East, and equatorial Africa. In addition to the alleles Gc IF and Gc IS , five variants, including one previously unknown, were found. The distribution of the alleles herein described permits speculation on exchanges and relation among the groups cons…
Gc and transferrin isoelectrofocusing subtypes among Brazilian Indians
New studies on the Macushi Indians of northern Brazil
Demographic data and genetic information concerning 40 genetic systems are reported for three populations of Macushi Indians, and have been compared to those already obtained for three other communities of this tribe. These are young populations (mean age, 19 years), with a low sex ratio (90), low percentages of non-Indian ancestry (1-2%) and of marriages between locally born persons (34). Intertribal unions (14%) are less frequent than among the…
Group-specific component (Gc) subtypes in Gambian and Transkeian populations
A total of 270 serum specimens from Keneba and Manduar villages of The Gambia and 126 from Bantu of Transkei were examined for the group-specific component (Gc) phenotypes by isoelectric focusing. Only one individual showed phenotype 2-2 in the Bantu population, and the sub-allele frequencies showed a distribution very characteristic of African populations. A new rare mutation, Gc1C34, was found in heterozygous combination with Gc2 allele. The sy…
Population structure and blood genetics of the Pacaás Novos Indians of Brazil
Two communities of relatively recently contacted Brazilian Indians, the Pacaás Novos, have been studied in relation to several demographic parameters and 28 genetic systems. The age and sex distribution, fertility and mortality patterns were not very distinct in the two populations, but they differed markedly in relation to the mating, migration and genetic data (six of the 19 variable loci showed differences higher than 10%). This was interprete…
Population distribution of the human vitamin D binding protein
The polymorphism of the serum vitamin D binding protein (DBP) in humans is based on the existence of three common alleles, Gc 1F , Gc 1S , and Gc 2 , and 84 rare alleles. The geographical distribution of Gc 1F , Gc 1S , and Gc 2 alleles shows north to south clines, together with a balanced equilibrium between the Gc 1F or Gc 1S allele frequency and the Gc 2 frequency. The distribution of the F ST values shows high variability within a geographica…
Isoelectric focusing studies of transferrin and haptoglobin subtypes in an Australian white population
This investigation presents the results of Hp and Tf subtyping of sera from 307 Australian whites by means of isoelectric focusing. Five Hp alleles were detected, these being Hp1F = 0.168, Hp1S = 0.235, Hp2FF = 0.003, Hp2FS = 0.561 and Hp2SS = 0.033. In the Tf system six alleles were found, TfC1 = 0.761, TfC2 = 0.176, TfC3 = 0.054, TfC6 = 0.002, TfB = 0.006 and TfD = 0.002. The usefulness of IEF together with modifications was highlighted for dif…
Gene flow across tribal barriers and its effect among the Amazonian Içana river Indians
Demographic information was obtained from 622 individuals of five communities of primarily Baniwa Amerindians living near the Içana river in Brazil. Four of these populations, plus another from the same area, were also studied genetically. The latter investigation included the blood and, in some cases, saliva of 531 subjects, variously tested in relation to 40 genetic systems. Demographically these groups are characterized by young age, high inte…
Polymorphism of the vitamin D binding protein (DBP) among primates
The distribution of the DBP (vitamin D binding protein) polymorphism is now well characterized among human populations but for primates only limited results are known. The aim of this paper is to describe the electrophoretic polymorphism of this protein among various species. Using three different electrophoretic methods, we are able to detect an unknown polymorphism and to classify the different alleles observed. These results may be used to set…
DNA and protein polymorphism
In this paper, the author analyses the different approaches of the DNA polymorphism. Mitochondrial DNA, RFLP haplotypes associated with serum protein polymorphism, variability of some small regions of the genome detected by minisatellite probes are now well developed and often adapted to population analysis. The data gathered are used to build phylogenic or genealogic trees. Despite the limited number sampled in these investigations, it is obviou…
Blood markers and genetic evolution in Cercopithecinae
A new cathodal Gc variant in Australia
A new cathodal Gc variant and a known rare variant were found in a study of 307 Australian caucasian blood donors, each with a gene frequency of 0·28%. The frequencies of the other alleles were 0·161 (Gc1F), 0·557 (Gc1S) and 0·279 (Gc2), and were comparable with those of two earlier surveys.ZusammenfassungEine neue kathodale Gc-Variante und eine bekannte seltene Variente wurden in einer Untersuchung von 307 europiden australischen Blutspendern ge…
Gm haplotype distribution in Amerindians
A review is made of the Gm haplotype distribution in 60 groups of Eskimos, North, Central and South American Indians, totaling 22,808 individuals. Differences were observed in the shapes of the distribution of Gm*ag and the other markers. Nearly identical values for F ST and average heterozygosities were obtained in the North+Central/South comparisons. North‐South and Southwest/Northeast clinal differences were observed in the Americas using corr…
Biology (13 works) · Allele (9 works) · Gene (9 works) · Genetics (9 works) · Demography (8 works) · Evolutionary biology (8 works) · Genetics (7 works) · Population (7 works) · Sociology (7 works) · Forensic and Genetic Research (5 works)