Sea urchin histone mRNA termini are located in gene regions downstream from putative regulatory sequences

Abstract
S1 nuclease mapping of the Psammechinus miliaris embryonic histone mRNA locates the 5'' termini in or adjacent to a short sequence homology (5''pyCATTCpu3'') downstream from the putative RNA polymerase II regulatory sequence (5''TATAAATA3'') or related sequences. The 3'' termini map just after a sequence containing GC-rich hyphenated dyad symmetry, a feature of most known terminator sequences.