positive regulation of isotype switching to IgA isotypes

Any process that activates or increases the rate, frequency or extent of isotype switching to IgA isotypes.

A change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a ionizing radiation stimulus. Ionizing radiation is radiation with sufficient energy to remove electrons from atoms and may arise from spontaneous decay of unstable isotopes, resulting in alpha and beta particles and gamma rays. Ionizing radiation also includes X-rays.

The processes involved in maintaining the methylation state of a nucleotide sequence.

The formation of either of the compounds secreted by the thyroid gland, mainly thyroxine and triiodothyronine. This is achieved by the iodination and joining of tyrosine molecules to form the precursor thyroglobin, proteolysis of this precursor gives rise to the thyroid hormones.

The chemical reactions involving ornithine, an amino acid only rarely found in proteins, but which is important in living organisms as an intermediate in the reactions of the urea cycle and in arginine biosynthesis.

positive regulation of receptor mediated endocytosis

Any process that activates or increases the rate, frequency or extent of receptor mediated endocytosis, the uptake of external materials by cells, utilizing receptors to ensure specificity of transport.

The formation from simpler components of ornithine, an amino acid only rarely found in proteins, but which is important in living organisms as an intermediate in the reactions of the urea cycle and in arginine biosynthesis.

negative regulation of receptor mediated endocytosis

Any process that stops, prevents or reduces the rate, frequency or extent of receptor mediated endocytosis, the uptake of external materials by cells, utilizing receptors to ensure specificity of transport.

Determination of asymmetry from the dorsal to the ventral side; as, the dorsoventral axis.

Determination of the identity of part of an organism or organ where those parts are of the type that occur in the dorsal region. Identity is considered to be the aggregate of characteristics by which a structure is recognized.