A lot of factors affect calcium absorption and transport, such as Vitamin d, fat, Parathyroidhormonerelatedpeptide, ratio of calcium and phosphorus and so on.
有许多的因素影响钙的吸收和转运，如维生素d、蛋白质、甲状旁腺素相关蛋白、钙磷比例等。
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Parathyroidhormone-related protein (PTI-IrP) is a homogenous peptide of parathyroidhormone, and both of them bind to the same membrane receptor.