- platelet alpha granule
A secretory organelle found in blood platelets, which is unique in that it exhibits further compartmentalization and acquires its protein content via two distinct mechanisms: (1) biosynthesis predominantly at the megakaryocyte (MK) level (with some vestigial platelet synthesis) (e.g. platelet factor 4) and (2) endocytosis and pinocytosis at both the MK and circulating platelet levels (e.g. fibrinogen (Fg) and IgG).
- ribitol biosynthetic process
The chemical reactions and pathways resulting in the formation of ribitol, a pentitol derived formally by reduction of the -CHO group of either D- or L-ribose.
- ribitol catabolic process
The chemical reactions and pathways resulting in the breakdown of ribitol, a pentitol derived formally by reduction of the -CHO group of either D- or L-ribose.
- ribitol phosphate metabolic process
The chemical reactions and pathways involving ribitol phosphates, any phosphorylated form of ribitol, the pentitol derived formally by reduction of the -CHO group of either D- or L-ribose.
- ribitol metabolic process
The chemical reactions and pathways involving ribitol, a pentitol derived formally by reduction of the -CHO group of either D- or L-ribose. It occurs free in some plants and is a component of riboflavin.