HCG: Receptor research and the IU unit

The LH/hCG receptor

Published cloning and sequencing of the human LH/hCG receptor provides a molecular foundation for receptor research. It describes the receptor and does not replace examination of a particular HCG sample. [1]

Why IU does not mean mg

IU stands for International Unit and describes biological activity relative to a standard. A universal conversion of “2,000 IU = x mg” cannot be given without material- and standard-specific data. The catalogue should retain clear, unambiguous units.

Vial and pre-filled format

The variants offered are HCG 2,000 IU as a vial and as a pen. The stated amount refers to the whole product in each case. For a liquid format, total activity and activity per unit volume are different quantities.

Documenting activity

For a particular batch, identity, suitable activity testing and traceable storage conditions matter. A receptor paper establishes neither the content nor stability of that batch. Results must remain tied to the material actually tested.

Sources & context

1. Cloning and sequencing of human LH/hCG receptor cDNA (1990)

Sources concern the models and preparations investigated, rather than a particular shop batch. Research products are intended exclusively for laboratory research, not for human use.