title: Binding of thyrotrophin to low molecular weight fragments of human thyroid membranes.
abstract: The LATS absorbing activity from thyroid homogenates which is associated with the soluble thyroid fraction (4S-LAA) binds TSH in addition to LATS. This may indicate that 4S-LAA originates from the receptor sites for TSH at the thyroid cell surface. The affinity of 4S-LAA for TSH is much lower than that of thyroid membranes suggesting that 4S-LAA represents incomplete receptor sites or receptor sites which are altered in their structure.
mesh_terms: D000042:Absorption; D001667:Binding, Competitive; D002462:Cell Membrane / Q000378:metabolism; D006801:Humans; D007525:Isoelectric Focusing; D008135:Long-Acting Thyroid Stimulator / Q000378:metabolism; D008970:Molecular Weight; D011956:Receptors, Cell Surface / Q000378:metabolism*; D013961:Thyroid Gland / Q000378:metabolism*; D013972:Thyrotropin / Q000378:metabolism*
chemical_list: D011956:Receptors, Cell Surface; D013972:Thyrotropin; D008135:Long-Acting Thyroid Stimulator