Results 11 to 20 of about 121,897 (259)

The structures of secretory and dimeric immunoglobulin A

open access: yeseLife, 2020
Secretory (S) Immunoglobulin (Ig) A is the predominant mucosal antibody, which binds pathogens and commensal microbes. SIgA is a polymeric antibody, typically containing two copies of IgA that assemble with one joining-chain (JC) to form dimeric (d) IgA ...
Sonya Kumar Bharathkar   +6 more
doaj   +4 more sources

Novelties in secretory structures and anatomy of Rhynchosia(Fabaceae) [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2015
A comparative anatomical study was carried out on the secretory structures of leaflets from taxa belonging to the genus Rhynchosia - taxa difficult to delimit because of uncertain interspecific relations - in order to evaluate the potential diagnostic ...
WANDERLEIA DE VARGAS   +2 more
doaj   +4 more sources

Structure of the human secretory immunoglobulin M core [PDF]

open access: yesStructure, 2020
Abstract Immunoglobulins (Ig) A and M are the only human antibodies that form oligomers and undergo transcytosis to mucosal secretions via the polymeric Ig receptor (pIgR). When complexed with the J-chain (JC) and the secretory component (SC) of pIgR, secretory IgA and IgM (sIgA and sIgM) play critical roles in host-pathogen defense ...
Nikit Kumar   +3 more
openaire   +2 more sources

Leaf and sepal colleters in Calolisianthus speciosus Gilg (Gentianaceae): a morphoanatomical comparative analysis and mechanisms of exudation

open access: yesActa Botânica Brasílica, 2021
Calolisianthus speciosus, an endemic species of cerrado and campos rupestres in Brazil, bears colleters in both the leaf base and sepal. These colleters (leaf and sepal) were anatomically compared to identify differences in their structure and secretion ...
Analu Zanotti   +3 more
doaj   +1 more source

Structural and histochemical aspects in leaves of six species of Anemia (Anemiaceae) occurring in rocky outcrops

open access: yesAnais da Academia Brasileira de Ciências, 2022
Rocky outcrops are known for low humidity, rainfall and high solar radiation, factors that limit the development of some vegetables. However, some species of the genus Anemia occurring in these environments.
PEDRO G. DE MORAES NETO   +3 more
doaj   +1 more source

Secretory structure diversity on Astronium leaf

open access: yesBotany, 2022
Astronium fraxinifolium Schott and Astronium graveolens Jacq. are included in the Anacardiaceae. The secretory structures of Anacardiaceae have been studied several times; however, there is a lack of knowledge related to these structures in Astronium, and there are inconsistencies in the taxonomy of the groups.
Carneiro, Tainah Eduarda Boian   +1 more
openaire   +2 more sources

New Reports on the Portuguese Endemic Species, Santolina impressa: Secretory Structures, Essential Oil Composition and Antiviral Activity

open access: yesPlants, 2023
Santolina impressa is an aromatic Asteraceae species endemic to Portugal, traditionally used for its anti-inflammatory properties. The aim of this study was to characterize S.
Ana Margarida Rodrigues   +4 more
doaj   +1 more source

Histochemical Analysis and Ultrastructure of Trichomes and Laticifers of Croton gratissimus Burch. var. gratissimus (Euphorbiaceae)

open access: yesPlants, 2023
Croton gratissimus (Lavender croton) possesses three distinct secretory structures. These include lepidote and glandular trichomes and non-articulated unbranched laticifers.
Danesha Naidoo   +4 more
doaj   +1 more source

An exploratory study of the functional significance of the floral secretory structures in two Miconia species (Melastomataceae) [PDF]

open access: yesAnais da Academia Brasileira de Ciências
Aiming to verify whether the diversity of secretory structures with their respective exudates are or not responsible for the attendance of floral visitors in Miconia species, the floral secretory structures of two Amazonian species of Miconia were ...
ANA CARLA FEIO   +2 more
doaj   +1 more source

Leaf secretory structures in Ceiba (Malvaceae - Bombacoideae): ontogeny, anatomy and histochemistry [PDF]

open access: yesRodriguésia
The description of secretory structures in Malvaceae is controversial, and results in conflicting interpretations. Amid conflicting interpretations, therefore, the present study aims to describe the ontogeny diversity and histochemistry in Ceiba ...
Lívia Peixoto Gonçalves   +4 more
doaj   +1 more source

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