
aiks. bee. aar. aeye.

aiks. bee. aeye. "zenopus" key liye bracurie (tii) jeane kaa ack samroop haye. yeh kasheruki gastrulation mein shamil ack pratilekhan sakriyak haye joe poore mesoderm mein vyakt kiye gaye jeane key pratilekhan koo sakriya karke pashch mesoderm pattern aur notocord vibhedan koo niyantrit kartaa haye. aiks. bee. aeye". key prabhaav ekagrata parr nirbhar karate hain jahan ekagrata pravanata "zenopus" mein vishisht prakaar key mesoderm key vikas koo niyantrit karati haye. aiks. bee. aeye., ventral endoderm dwara sanshleshit aff. jee. aff. pratilekhan kaarak kii abhivyakti key parinam hain. isaliye jabaki ventral mesoderm mein aff. jee. aff. aur aiks. bee. aar. kii uchch sandrata hoti haye, dorsal mesoderm mein dou anya pratilekhan karakon, siamois aur aiks. aine. aar. key punarmilan kii visheshta hoti haye, joe gooskoid pratilekhan kaarak key sanshleshan koo sakriya karate hain. gooskoid aiks. bee. aeye. key kshay koo saksham banaata haye. sankshep mein, "exbra" kii uchch sandrata ventral mesoderm koo prerit karati haye jabaki cumm sandrata peeth key gathan koo uttejit karati haye.
pashch mesoderm vikas kramshah precordal mesoderm aur cordmesoderm koshikaon mein dou prakaar key koshika vyavhaar, koshika pravaas aur abhisari vistaar prastut kartaa haye. koshika pravaas koo precordal mesoderm koshikaon dwara pradarshit kiya jaataa haye, jisake parinamswarup bhavishya key poorvavarti chhor kaa nirmaan hotaa haye. "aiks. bee. aeye". abhisari vistaar koo prerit kartaa haye joe koshika pravaas koo rokta haye aur cordmesoderm koshikaon koo ack sanrachana mein punarvyavasthit kartaa haye joe baad mein notocord mein bhinn hoe jaayegi. natijatan, "exbra" inn donon vyavhaaron key beach parivartan key liye ack parivartan key roop mein kaary kartaa haye.
"aiks. bee. aar. aeye". aff. jee. aff. sanket key madhyam seey apratyaksh roop seey, vishesh roop seey prishthiya mesoderm key liye, khud koo sakriya karane mein saksham haye, jabaki ee. aff. jee. aff. "aiks. bee. aar. aeye". abhivyakti koo banaae rakhta haye, jisase ack swachaalit loop banata haye.
exbra" key avrodh seey mesoderm kaa asamanya swaroop banata haye, jaise kii chhota tanaa. ack pichhale adhyayan mein, "exbra" key sakriyan kshetra koo drosophila utkeernit protein key damnak kshetra dwara pratisthaapit kiya gayaa thaa taaki ack pramukh-hastakshep karane vaalaa "exbra" nirmaan banaaya jaa sakey joe "exbra" key kaary aur viniyaman kaa adhyayan karane mein madad karega. iss sanrachana koo aar. aine. aeye. encoding key injection seey vibhinn janm dosh jaise doshpurna blastopore bund honah aur vikaasheel bhroon mein asamanya notocord vibhedan huaa haye. 

