Gene Networks Database
Strongylocentrotus purpuratus Genes in Development:
Sea urchin retroposon family 1
SURF1-1 is a member of a family referred to as SURF1
(sea urchin retroposon family 1).
This gene is expected to lie within the first intron of the
single muscle actin gene and the family of these elements
is present about 800 times in the genome (Nisson et al., 1988).
SURF1-1 sequence appears to have been amplified and
dispersed in the genome via RNA intermediates (Jagadeeswaran et al., 1981),
and therefore referred to as retroposons (Rogers, 1985).
The expression of SURF1-1 RNA is highest at 11 hours postfertilization
(about 128 cells) and drops as development procedes.
The expression is highest during the cleavage stages and decreases
as development proceeds during which time the is increasing differentiation
of a variety of cell types (Nisson et al., 1988).
Method: hybridization to a 32^P-labelled RNA probe
Reference: Nisson et al., 1988
||11 hour embryo (Cleavage)
RNA polymerase III gene
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