Biomedical subjects

T Allen

Publications and source records attributed to T Allen.

92 records · Page 6Linked to original sources

PubMedDate not supplied

Sequential expression of two late nodulin genes in the infected cells of alfalfa root nodules.

The Nms-22 and leghemoglobin (Lb) genes are expressed exclusively in the infected cells of alfalfa root nodules. Expression of these two late nodulin genes originated at distinct cellular boundaries within the symbiotic region of the nodule. The Nms-22 gene was expressed in all infected cells, including those just adjacent to the meristematic region. Lb gene expression was induced in older infected cells and was most prominent in the mature region of the nodule. Despite this temporal separation of gene expression, both the Nms-22 and Lb genes were expressed in nodules elicited by bacA mutants in which bacteroid development has been blocked just after release from the infection thread.

Fabaceae↗

PubMedDate not supplied

Significance of echogenic foci in the left ventricle of the fetal heart in a low-risk population.

OBJECTIVE: To determine if there exists a significant association between prenatally detected left ventricular echogenic foci and chromosomal abnormalities. METHODS: Over a 10-month period the presence of intracardiac echogenic foci was recorded on all low-risk patients referred for anatomical assessment. The study group consisted of 113 singleton fetuses and was compared to a control group with no foci. RESULTS: Among the study group with echogenic foci, 5 chromosomal abnormalities (three trisomies) were detected. In the control group only one chromosomal abnormality was diagnosed. CONCLUSION: An association exists between the finding of intracardiac echogenic foci in the fetus and the presence of chromosomal abnormalities.

Adult↗