Haemoglobin, serum albumin and transferrin variants of Bali (Banteng) cattle, Bos (Bibos) javanicus

1. Individual blood samples from 144 Bali (Banteng) cattle [Bos (Bibos) javanicus] in the Northern Territory of Australia and from 61 Bali cross cattle, were examined by zone electrophoresis to determine the variants of haemoglobin, serum albumin and transferrin that are present. 2. Of the common cattle haemoglobin variants (A and B) only variant B occurs in the Bali cattle samples. A second variant, designated CBali, occurs in Bali cattle either as the heterozygote (B CBali) or as the homozygote, the frequencies of occurrence indicating a two-allele system of inheritance without dominance. The CBali cross samples may exhibit the homozygous or heterozygous A variant. 3. The CBali variant has an electrophoretic mobility intermediate between those of the A and B variants at pH 8.6 and 9.1 but closer to B than to A (B greater than C greater than A). It appears to be similar in mobility to the C variants found in Indian Khillan (CKhillan) by Naik, Sukumaran and Sanghvi (Anim. Prodn, 1965 I, 275-277), and in Asian cattle by Oishi, Abe and Namikama (Immunogenet. Lett., 1968 5, 170-173) and Abe, Mogi, Oishi, Tanaka and Suzuki (Proc. XIIth Europ. Conf. Anim. Blood Groups Biochem. Polymorphisms 1972, pp. 225-228), but appreciably different from those in Kenyan and Rhodesian cattle (CRhodesia) found by Braend (Anim. Blood Grps Biochem. Genet., 1971 2, 15-21) and Carr (Rhod. J. agric. Res., 1964 3, 62-62A), respectively. It is also different in mobility from the C variant found by Winter, Mayr, Schleger, Dworak, Krutzler and Burger (Res. vet. Sci., 1984 36, 276-283) in the mithun.(ABSTRACT TRUNCATED AT 250 WORDS)     

Genetic and Structural Analysis of Five Arabidopsis Mutants with Abnormal Root Morphology Generated by the Seed Transformation Method

A number of Arabidopsis thaliana mutants with abnormal rootmorphology have been isolated from a population of Agrobacterium-mediated seed transformants. Five of these mutants identifiedby their abnormal root morphology have been genetically andmorphologically characterised. Two mutants, 5905 and 1767 havedefective cellular elongation, mutant 7203 lacks an endodermalcell layer and mutants 4792 and 7133 exhibit abnormal radialcellular expansion. It is apparent from detailed analysis thatabnormal root morphology is accompanied by abnormal hypocotylphenotype. Genetic analysis has revealed that only one of thesemutants is tagged with a T-DNA insert.Copyright 1994, 1999 AcademicPress Arabidopsis thaliana, root, development, T-DNA insertion mutagenesis, endodermis, elongation     

In vitro antitumor activity of 2'-deoxy-5-fluorouridine-monoclonal antibody conjugates

5-Fluorouracil (5-FU) is an anticancer drug used in patients for the treatment of gastric and breast cancer and used either alone or in combination with methotrexate is one of the few drugs with some effect on colon cancer. 2'-Deoxy-5-fluorouridine (5-FUdr) (1) is an analogue based on 5-FU and can be covalently linked to a murine anti-Ly-2.1 monoclonal antibody (mAb) with the active ester derivative of 2'-deoxy-5-fluoro-3'-O-(carboxypropanoyl)uridine (5-FUdr-succ) (4). Such immunoconjugates can contain up to 42 residues of drug, although the most antibody activity was retained when substitution ratios were between 10 and 25 molecules of drug to mAb. In a cytotoxicity assay, 50% inhibition of [3H]deoxyuridine incorporation (IC50) with a murine Ly-2.1+ve thymoma cell line was 6 nM for 5-FUdr-anti-Ly-2.1, which is 12-fold more than that for free 5-FUdr (IC50 = 0.51 nM) but similar to that of 5-FUdr-succ (IC50 = 5.2 nM). The 5-FUdr-monoclonal antibody conjugates (5-FUdr-mAb) were 100-fold more active on the Ly-2.1+ve E3 cell line than on the Ly-2.1-ve BW5147 OU- cell line. The high in vitro activity and specificity of 5-FUdr-MoAb conjugates indicates that potent in vivo activity of these conjugates should be expected.     

Multiple mating and sperm displacement in a natural population of Drosophila melanogaster

Summary Mother-offspring data for alcohol dehydrogenase genotypes of a vineyard cellar population of D. melanogaster are best explained by a model that allows 21% of females in the population to mate twice with an 83% level of sperm displacement. A population model with multiple mating and sperm displacement is examined theoretically. A formula for the effective population size is derived under this model. Multiple mating increases the effective population size relative to single mating.     

Surface markers of a purified peritoneal eosinophil population from Mesocestoides corti-infected BALB/c male mice

Eosinophils of approximately 95% purity were prepared from the peritoneal cavities of BALB/c male mice infected with larval cestode, Mesocestoides corti. The alloantigenic surface marker phenotype of this cell population was shown to be H-2+Ly4+Ly5+Lyt-1-,2-,3-Ly-6-,7-Ia-Thy-1-TL-. Two of four anti-Lyt-2 sera were positive when tested on purified eosinophils by using the Staphylococcus aureus protein A sheep erythrocyte rosetting method, but absorption studies indicated that this reaction was not due to anti-Lyt-2 antibodies. Eosinophils are therefore Lyt-2-, although some Lyt-2 sera contain additional eosinophil reactive antibodies. A proportion (20 to 40%) of the population of eosinophils was positive for the Fc receptor, but all were negative for the C3 receptor and for surface immunoglobulin.