Mindblown: a blog about philosophy.
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Sitosterols
A group of similar organic compounds that occur in plants. They contain the steroid nucleus, perhydrocyclopentanophenanthrene.
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Site-specific
Properties of cellular receptors that vary with their body location or milieu.
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Splice site
The location on a strand of messenger RNA where the molecule can be cut and reannealed during the regulation of protein synthesis by cells.
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Primary site
The tissue of origin of a metastatic tumor.
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Port site
The location on the skin where a laparoscope or other device (e.g., subcutaneously implanted medicine reservoir) is inserted into the body .
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Exit site
The location on the skin where an implanted device (e.g., a surgical drain) leaves the body.
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Cleavage site
The location on a polypeptide molecule where peptide bonds are broken down by hydrolysis.
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Binding site
The particular location on a cell surface or chemical to which other chemicals bind or attach.
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Sister Mary Joseph nodule
A hard, periumbilical lymph node sometimes present when pelvic or gastrointestinal tumors have metastasized.
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Sirtuins
Any of a class of proteins that deacylate histones and keep chromatin from being transcribed. Also known as Sir proteins, members of this class of chemicals may contribute to longevity.
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