WordNet

a curve that is tangent to each of a family of curves
the bag containing the gas in a balloon (同)gasbag
a flat (usually rectangular) container for a letter, thin package, etc.
any wrapper or covering
a natural covering (as by a fluid); "the spacecraft detected an envelope of gas around the comet"
the maximum operating capability of a system (especially an aircraft); "test pilots try to push the envelope"
enclose or enfold completely with or as if with a covering; "Fog enveloped the house" (同)enfold, enwrap, wrap, enclose
surrounding and closing in on or hemming in; "the armys enveloping maneuver"

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The need of MMP-2 on the sperm surface for Xenopus fertilization: Its role in a fast electrical block to polyspermy.

Iwao Y1, Shiga K2, Shiroshita A2, Yoshikawa T2, Sakiie M2, Ueno T2, Ueno S2, Ijiri TW3, Sato KI3.
Mechanisms of development.Mech Dev.2014 Oct 5. pii: S0925-4773(14)00066-5. doi: 10.1016/j.mod.2014.09.005. [Epub ahead of print]
Monospermic fertilization in the frog, Xenopus laevis, is ensured by a fast-rising, positive fertilization potential to prevent polyspermy on the fertilized egg, followed by a slow block with the formation of a fertilization envelope over the egg surface. In this paper, we found that not only the en
PMID 25296387

Structural studies of 'aggregation-prone' peptide-analogues of teleostean egg chorion ZPB proteins.

Louros NN1, Petronikolou N, Karamanos T, Cordopatis P, Iconomidou VA, Hamodrakas SJ.
Biopolymers.Biopolymers.2014 Sep 17. doi: 10.1002/bip.22563. [Epub ahead of print]
Egg envelopes of vertebrates are composed of a family of proteins called zona pellucida (ZP) proteins, which are distinguished by the presence of a common structural polymerizing motif, known as ZP domain. Teleostean fish chorion is a fibrous structure, consisting of protein members of the ZPB/ZP1 a
PMID 25229478

Characterizing the transcriptome of yellow-cheek carp (Elopichthys bambusa) enables evolutionary analyses within endemic East Asian Cyprinidae.

Zou M1, Guo B2, Ma X3.
Gene.Gene.2014 Sep 1;547(2):267-72. doi: 10.1016/j.gene.2014.06.056. Epub 2014 Jun 25.
The identification of genes that may be responsible for the divergence of closely related species is one of the central goals of evolutionary biology. The species of endemic East Asian Cyprinidae diverged less than 8millionyears ago, and the morphological differences among these species are great. H
PMID 24973763

Novel serine proteinase inhibitor with inhibitory activity for metalloproteinase

Ultrastructural studies of the formation of the egg capsule in the hermaphroditic species, Isohypsibius granulifer granulifer Thulin, 1928 (Eutardigrada: Hypsibiidae)