actin /ac·tin/ (ak´tin) a muscle protein localized in the I band of the myofibrils; acting along with myosin, it is responsible for contraction and relaxation of muscle. It occurs in globular (G-actin) and fibrous (F-actin) forms.
actin,
actin (akˑ·tin),
ac·tin ( k t n)n. One of the protein components found in muscle, existing as F-actin or G-actin, into which actomyosin can be split and which acts with myosin in muscle contraction. |
actin,
a protein forming the thin filaments in muscle fibers that are pulled on by myosin cross-bridges to cause a muscle contraction. Some bacteria forms actin tails to use for motility. See also myosin.
actin (akˑ·tin),
n one of a pair of myofilaments involved in muscle contractions. See also myosin.
actin
a muscle protein localized in the I band of myofibrils; acting along with myosin particles, it is responsible for the contraction and relaxation of muscle.
actin F
assembly of actin G monomers into filaments.
actin filaments
smallest filamentous proteins involved in a static role in cell structure and a dynamic role in cell movement.
actin G
monomeric globular protein which assembles into actin filaments.
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