parathyroid gland molecular composition trait parathyroid gland ribonucleic acid amount 2025-05-01T20:33:22Z VT:0011170 CMO:0004082 Trait.ontology parathyroid gland RNA amount The proportion, quantity, or volume of ribonucleic acid in in one of the two small, paired endocrine glands, usually found embedded in the connective tissue capsule on the posterior surface of the thyroid gland. Ribonucleic acid is a high molecular weight, linear polymer composed of nucleotides containing ribose and linked by phosphodiester bonds.