Sphingolipids

A group of acyl lipids has a sphingosine-based structure (Figure 8). The derivatives of sphingosine are cerebrosides and ceramides. They are characterized by having sugar molecules as part of their structure and thus are called glycosphingolipids. The most common sugar moiety is galactose. There is a large family of mono-, di-, and trigly-cosyl ceramides. Some of the glycosphingolipids have sialic (N-acetyl neurominic) acid linked to one or more of the sugar residues of a ceramide oligosaccharide. These are called mono-, di-, and trisialogangliosides and are abundant in membranes, particularly in nervous tissue. Their amphi-pathic structures are functional in membranes and in the water impermeability of skin.

Breaking Bulimia

Breaking Bulimia

We have all been there: turning to the refrigerator if feeling lonely or bored or indulging in seconds or thirds if strained. But if you suffer from bulimia, the from time to time urge to overeat is more like an obsession.

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