LOC_Os03g25990 EXPA21 264 EXP21_ORYSJ OsEXPA21 OsEXP21 OsaEXPa1.21 MAPPSLPILLVLLSLSSSLSSSSAAAAGRWTDAHATFYGGADASGTMGGACGYGNTYGQGYGTDTAALSAVMFGDGLSCGACFELRCGGGGGGDRRGCLPPAAGKSIVVTATDLCPANHALPGDRGGWCNPPLHHFDLSQPAFLRIARFQSGIVPVSYRRVACRRKGGMRFTINGHSYFNLVLVSNVGGAGDVHAVAVKAGGGRKARWQAMARNWGQNWQSGALLDGQALSFTVTTGDRRSVVSYNVAPAGWAFGQTFTGRQFT May cause loosening and extension of plant cell walls by disrupting non-covalent bonding between cellulose microfibrils and matrix glucans. No enzymatic activity has been found. May be required for rapid internodal elongation in deepwater rice during submergence (By similarity). Alpha-expansin-21 Os03g0377100 EXP21 OSJNBb0048D20.14 Expansin-A21