<p>Somatotropin is a hormone that plays an important role in growth control. It belongs to a family that includes choriomammotropin (lactogen), its placental analogue; prolactin, which promotes lactation in the mammary gland, and placental prolactin-related proteins; proliferin and proliferin related protein; and somatolactin from various fish [<cite idref="PUB00003394"/>, <cite idref="PUB00000308"/>, <cite idref="PUB00000338"/>, <cite idref="PUB00000588"/>].The 3D structure of bovine somatotropin has been predicted using a combination of heuristics and energy minimisation [<cite idref="PUB00000346"/>].</p> Somatotropin hormone, conserved site