In the absence of ATP, the myosin head is firmly attached to the actin filament. 

TLS Online TPP Program

#Id: 8095

#Section 2: General Biology

Platelet-activating factor released from basophils and stimulates platelet aggregation and the release of vasoconstrictor serotonin from platelets.

TLS Online TPP Program

#Id: 8094

#Section 2: General Biology

Platelet-activating factor has a long ether-linked alkyl chain at C-1 of glycerol, but C-2 is ester-linked to acetic acid, which makes the compound much more water-soluble than most glycerophospholipids and plasmalogens.

TLS Online TPP Program

#Id: 8093

#Section 2: General Biology

TLS Online TPP Program

#Id: 8092

#Section 2: General Biology

The peroxisome is the primary site of plasmalogen synthesis.

TLS Online TPP Program

#Id: 8091

#Section 2: General Biology

Plasmalogens are ether glycerophospholipids in which the alkyl moiety is cis-a, b-unsaturated

      

TLS Online TPP Program

#Id: 8090

#Section 2: General Biology

In triacylglycerols, glycerophospholipids, galactolipids, and sulfolipids, the alkyl groups are fatty acids in ester linkage.